Did a demolition in an old doctor's office and took to the shop over 1k lbs of xrays, a summer project and your video is the best put there. Common chemicals while others weRe asking for money for the chemical list, you shared this with us for free, thank you very much, great video.
Well, it's 3 full pallets, now that I moved them again it's more like 2k pounds. Willing to donate one full pallet to you and the channel, if you do a video showing what a 3 lbs plus of silver looks like, but it would take awhile, but worth it maybe for the channel and the cash. It would be cool to get a high school chemistry class to help you or something. Just thought I would offer, love your channel and I've learned a lot, the offer is there if you decide on it, but I'm in Detroit. Best wishes, and keep rockin.
Dave, thank you for the kind offer. Are you certain that the films are silver? Some processes use film that has no silver. I'll bet that a pallet of film weighs a ton.
I have prospected in the past. Now I have to find a new hobby. I went through a huge back surgery to correct my spine from scoliosis which eventually turned into dextroscoliosis . It’s been a quite a while recovering. All is good now. Just wanted to say thank you so much for all the hard work you’ve put into your craft and sharing with us.
My brother I just died in April 2022, he was a chiropractor. He has years worth of x-rays I’m presuming 500 pound anyways, my sister-in-law is giving that to me. Just for this purpose… Thank you so much for the info!
Tip to cut the time removing silver from x-rays. The silver is only on the dull side. Put two sheets together back to back exposing both dull sides while dipping. I've been a photographer for 40 years.
For higher yield buy photographically unprocessed film , Silver halogen that is on the gelatin of the film was already used to create silver oxide ( the dark image on the film) hence creating negative image, Most of silver halogen (silver bromide ) was already regenerated to silver and stripped in fixer bath . Recovered silver remained in the hypo and you bought material that had less than 20 % of original silver content. I checked on Ebay for unprocessed Xray film and for the price you paid you could buy unexposed film and recover 5 times the amount of silver you received, You were correct to assume 2.5 oz of silver from 5,5 lb of film, but because most of the weight was in cellulose and silver had already been extracted before you bought it 1/2 oz is a good yield . I have been working for a large photo company for 20 years and silver recovery was part of my job. Recovery was done by methods other than bleach stripping, and hypo solution would yield 1 oz of purest silver per 1000 sq. ft of combined photographic paper and film processed.
Hello. The conventional film are using developer to develop the image. Now the medical industry mainly use computered radiography which we call it CR film in Malaysia. Is it contain silver too? I have some sample photo of it. Thank you. Khoohmkhoo956@gmail.com Here's my mail. Thank you.
Refining my own bullion and a retired paramedic. I would have never thought about x-ray film. I have no plans to either but it was a great and educational video. Thank you
Great information sir. I used to be a radiographer doing weld inspection. Since I'm a pac-rat, I have a lot of old film laying around. Lol I might try your process here and have a steak dinner. Thank you sir.
Well in case you will repeat this recycling I suggest 2 faster methods like: - Cut the plastic: A paper shradder would be GREAT cheap and effective. A paper cutter as you used for cutting the electronics fingers from those 150++ boards that you got more gold than you expected - Bath the plastic: I suggest using something short and larger so that you can put the plastic all inside without the need of tipping in-out something like OLD PHOTO DEVELOPING but bigger. From what I can spot in the video, the silver would go away from the plastic very nice using a brush. - Settling of the metals: I think that some kind of "VIBRATION" would make the settling A LOT FASTER! I would be nice to make a desk with a drill that is gently beating the undersurface of the desk, in this way all desk would slightly vibrate to facilitate the settling. Hope that would be a nice addendum to your future X-ray silver recovery method ;)
Hi. Thanks for the video. I have actually done the silver chloride/lye/ sugar methods a number of times. I like it. The largest batch I did was 40#'s Xrays from which I got about 2 ozt of silver. I used lye to strip the Xrays, It appears your bleach did it much quicker, so I may try that in the future. When it came to the sugar, Kyro syrup alone or with a little honey and water works great. Much quicker. If you put too much sugar in you'll have brown waste which is the sugar being carmalized. It has caused me not problems. If I can find the picture of the bar I got I'll post it. The yield you got appears consistent. I didn't expect you to get the couple ounces you mentioned in the beginning of the video with the amount of Xray film you had. It of course varies with the quality of the Xrays. Older Xrays (which mine were) have a denser coating on them compared to today's, that is if you can find Xray today with all the places going to digital. Thanks again for the video!
have about 700 lbs of plastic film with silver on it after watching this video i think it will stay where it is seems like to much trouble for what is recovered a great project if you have the time keep up the great videos thanks again
I think you did great I will look for a lot of videos and couldn’t find a lot to explain specially when somebody’s talking you through it makes it better it was maybe one or two other videos that was silent great job
Really like the video but can you explain what the purpose for the Sodium Hydroxide and table sugar? There are other videos show placing the silver sludge in a coffee filter and going straight for the melt. Much thanks
I was thinking that the sludge was a chloride since it came off with chlorine bleach. I used lye to convert the silver chloride to silver oxide - but I do not know if this was even necessary, it didn’t react like I expected, but this whole thing was a big experiment. After converting silver chloride to silver oxide (I think) then I added sugar to convert the silver oxide to pure silver metal. That seemed to work fine. But I may have had silver oxide before adding the lye - I don’t know. Silver oxide will melt into pure silver metal without the lye and sugar. I only did this once. I’ll probably never do it again. It was messy, time consuming, produced much waste that had to be treated before disposal and the yield was low. I couldn’t find a video on it. The videos that existed back then showed bits and pieces, then directed you to a web site and for a fee you could get the rest of the process. This disturbed me so I decided to do a video of the complete process.
@@sreetips I think you gave all of us what we needed and proved your point. The process was interesting and easy to follow and the result was spot on. Thank you...
I worked in the printing industry (four color pressman) for sixteen years years (1989-2005), and we always operated a darkroom to make film negatives for plate making. A company would come by once a month and collect the discarded film negatives and used developer solutions to recover the silver from. They collected these same materials from printing companies all over the Phoenix metro area, and they got them for free! I imagine that a tidy profit could have been made, since they are getting the silver bearing materials for free. A streamlined operation could be set up, and you could be in the black fairly quickly (I assume). It looks like quite a lot of film negatives and used developer is needed to produce an ounce of pure silver, but once again, if you're getting the materials for free, the bleach, sodium hydroxide, and sugar are very inexpensive. The most significant amount of overhead will be for labor. Unless you are doing this for yourself, you will need to pay someone to work your operation. You'd have to keep them busy, and process enough material to cover your expenses for chemicals and wages. I imagine that they were making money at it, since they were in business for the entire time that I was in the printing industry.
interesting as an educational purpose ! it gives sense on the word "recycling", thanks for all your work, i also enjoy all you videos about gold refining
This is a great video..many thanks, having worked in the medical X Ray industry for years, I have a good stock of X Ray film silver halide recovered from electrolysis units, I would say it is around 5kg....however it is like a fine black sand with a sulphur like odour, it is very dense and settles quickly in distilled water, IE it forms a sand like layer, but it is black and not grey like your metallic residue detailed here...do you have any suggestions how to process it to metallic silver ( it is definitely silver as it has come from recovery machines) thanks
In my experience, it may be silver oxide. Silver oxide is black in color, in my experience. If it were me, I would get a small sample, say about 100ml volume, and I'd put it in a crucible and heat it to 1000 degrees C or 1948 degrees F. Silver oxide, when heated, releases the oxygen and leaves behind pure metallic silver metal. Another experiment that I would try is to add a gram of sodium hydroxide to a 100ml sample of the black material, then stir and add some sugar. If it's silver oxide then I would expect to see the black silver oxide turn to pure elemental grey silver powder. This is what I would do, if it were me.
there is a some x ray film which is exposed by light but differ from used x ray film so this kind of x ray film only washing by naoh and filter then melt plus getting a product i think so because the silver is accumulated mainly.Say something and start this project?
I learned a lot from this. Mainly, not to buy films from eBay. But I wish I kept the stack of old panoramic dental films I saw a few years ago get tossed. Maybe I can find a free stack again and refine them.
Someone made a comment about settling more with regards to your yield. I didn't expect 2 ounces from the amount of Xray film you had there from my experience, but I do think that making sure every bit is converted to silver chloride and letting the silver chloride settle until liquid is clear before decanting would've increased your yeild. Then at that point lye until dark black (from my experience) and no more reaction, then a liquid sugar like Kyro syrup diluted just a little and add until you start to get it very brown (excess sugar is carmelized) then rinse, let settle, and repeat until clear. Then you can be confident you have converted and recovered ALL the silver present. I would've still been surprised if you'd gotten a whole troy ounce but you might have recovered more. Still, I love your videos. Much respect!!
Scott its a film. It will have no silver chloride which is less sensitive and mainly is is used in contact printing, Film will contain Silver bromide or in rare cases silver fluoride , which will be the emulsion.depending on application. Buying exposed/processed film by pound is like buying a goldfish with 5 gallons of water and paying per pound.
John Abramyan Hi John. you missed the word **converted** the silver based emulsion is converted to silver chloride then converted to silver oxide by the lye, then to metallic silver by the sugar.
John Abramyan. It’s called *yield*. If you know how many goldfish each lb of water yields you could purchase goldfish by water weight. Knowing that older heavier coated X-ray film gave me 2 ounces nearly pure silver from approximately 40lbs of film goes toward estimating “how much to pay by weight for that goldfish containing water”. 😉
When I use this process for developed black and white film ( which is what X-ray film is) I always use a vacuum filter before converting AgCl to AgO. There is always a gross amount of the emulsion and silverhalide carried over with this process. Your yield was better than expected. Better than the same mass of keyboard mylars.
Hello sreetips my name is Yoem Diaz and I tell you that I have learned a lot from you, I saw some of your videos that I would like to know how many grams of silver came out on that occasion with only 150 grams. here is the link of you tube Silver Cell Build Step by Step From Scratch thank you very much for what he does
Amazing. I had no idea that was that easy. I worked for a company dealt with recycling xrays, but we shipped them to a refiner. I was doing the math and it was impressive for a 25,000 pound truck load at a time. We did that every couple of months.
The yield was roughly 0.1 troy ounces per pound or 1 troy ounce for every ten pounds. So 25k pounds would produce 2500 troy ounces! It took me six hours to get the silver off of five pounds. 25,000 pounds would take me the rest of my life.
Great demonstration, I've always wondered how silver recovery from film works. That 0.525oz is a much lower yield than I expected from over 5lbs of material, which is OK, because now I have a realistic idea of what to pay for this type of silver recovery scrap. Thank you so much for taking the time to explore all of these different recovery and refining methods, and sharing your findings with all of us! Do you have a Patreon or some account where I can make a monetary donation to help keep these videos coming?
Is there any silver left in developed color photos from the late 70's, 80's to 2000 ?(common photos processed from a Wal-mart or equivalent)? Thank you.
Great video, thanks. Can I add to the calls for a video on the reclamation of silver in suspension please ! Years ago, when film development was manual, we use to sell the spent Fix solution for the modern equivalent of 20 Dollars/Gallon (with a lot of wheeling and dealing between us and the scrapman) I was told by old heads that the process involved a trickle charge of current and produced 'Black Silver' - I've still got some 'Silver Estimating' papers somewhere... i was also told that silver recovery from film was done by burning the excess away to leave silver behind - I've no idea if this was true, its just what I was told !
Fill a bucket full of steel wool and pour the fixer in stirring ever so often and then letting the silver bind to the steel wool....once all the fixer is gone and drained out rinse the steel wool with water and walla....there's your silver. I have over 5,000 pounds of film in my shop so I believe bringing it straight to the refinery works best for me. BTW.....the steel wool has some sort of chemical electrical reaction to the fixer and silver so the silver binds to the steel wool.
Sorry, I only did this once to demonstrate. I’m not sure of undeveloped films. But be aware, not all xray film contains silver. Some are heat activated.
If I did this again I'd use a 5 gallon bucket instead of the small bucket that I used in the video. If I remember it took me 6 hours to strip five pounds! Good luck with it.
13:37 here you see a man MOVE'N with a purpose,,,,,,,,LOL ka-ching,,,,ka-ching.,,,,,Mrs Sreetips is smile'n.It's look'n alot like Christmas,that happy time of year.
Thank you for your time and efforts. And expence . Your efforts have saved us time effort and money. But most of all...thank you for emphasizing safety.too many videos out there gonna get someone sick or hurt.😎
Hey sir...did u know by what chemical we can precipitate the photographic chemical waste which have in photo house?...and in ur exp,t is it naoh is enough...using nacl03 is give us best silver?
some other person tried bu using hno3 likeSilver recovery by chemical leaching depends on the heating of the film in the solution of oxalic acid (H2C2O4), nitric acid (HNO3), sodium hydroxide (NaOH), at boiling temperature for the separation of the inorganic component from the polymer layer. The development of X-ray film leads to waste from the fixer and from the aqueous solutions containing from 1000 to 10,000 mg Ag/L and respectively 50-200 mg Ag/L silver in form of thiosulfate complex how do u seen ?
Tem, you're way over my head here. I got this to work because I'm familiar with these reactions from my years of refining experience. I used bleach to get the silver off the films. I duducted that there was silver chloride in the material that came off the films. So I added NaOH to convert any silver chloride to silver oxide. Then I added sugar, just like we use to sweeten our breakfast cereal, to convent the silver oxide to pure elemental silver metal. Rinsed off all the sugar and lye, then melted the silver into a button. I bought those films for $100 on eBay because they were guaranteed to have silver on them. I needed them to make the video. Some films do not have silver. I don't know how to tell which do and which don't have silver. All I really needed to know is what solution was used to get the silver off the films. Turns out it's just regular household bleach. The rest is history as documented in my video. Good luck!
We used to recover silver from the fixing bath of black and white film development. We used powdered zinc to precipitate the silver out of the solution. Allowing the zinc silver mix to settle out we would recycle the fixing bath and allow the mud to dry. This mud can be smelted to separate the zinc from the silver.
Smelting is a term used to describe extracting metal from ore. To seperate the zinc and silver, both are dissolved in hot dilute nitric acid. Then copper metal is introduced into the acidic zinc/silver solution. Zinc, being above copper in the reactivity series of metals, will stay in solution. Silver being located below copper in the reactivity series of metals, will cement (precipitate) out as nearly pure silver metal as a grey powder that looks like wet cement. This is where the term "cement" comes from. (Edited once for spelling).
The bleach batch you used are of what content each ie each bottle content is how many ml, or I should just get a gallon and empty into the bucket. Secondly the bucket that have water in it, it is just water or a combination of water and something else? Thanks as I await you response.
Great video, I'm just wondering if shredding the xrays then dropping in a bucket of bleach and stirring would not maybe save a bit of bleach or cutting into smaller squares so that they can all get dropped into the bucket at once?
Excellent video. I wonder what one would get as yield from soldered copper pipe ends, since that type of solder contains silver. Not to mention solder that is sucked off of old print circuits. I gather quite a bit of it working on electronics, especially vintage electronics where parts are soldered to contact bridges. Thanks for your sharing your knowledge and video. It was entertaining and interesting
I bought some silver solder from the welding supply store. I've had it for about two years now. A whole tube of it for about $50 bucks. I had forgotten all about it. It would make a great video. Thank you.
Shredding will be a wasted effort, because the coating on the sheet contains silver. That needs to be submerged to dissolve it in bleach or Nitric acid...
I had to do some wastewater testing for an industrial permit at a college and one part was for the building for dental hygienists and nurses. Figure chemical treatment system along with silver recovery systems for the Xray and dental areas. Even in the wastewater pipes leaving the building I could detect silver. The worst part, the copper pipes for the drains from all the HVAC units. The pipes from the labs were glass and no problems with the chemical system.
Thank you so much For doing that.. Yes you demonstrated how to extract the silver and also gave us kinda a formula to go by when doing ut ourselves and wether or not its worth it to follow the project all the way through or not.... That's assuming that all x-rays are generally about the same in their silver content... I would love to invest to get started... But the way things are going right now.. I am building a gravity fed water filtration system.. So we can have clean water.. Things are so different anymore.. The carefree days have vanished.. These are different times.. I think a good water filtration system will be the smartest thing i have ever done... Even better than college.. Ha ha ha ha ha ha. Well the smartest thing Next to making colloidal silver.. Have a nice evening
I do not. I bought this online just to make the video. Some X-ray film contains no silver at all. I bought this because it was certain to have silver. I don’t know how to tell the difference
if you know the step tell me the way having after the waste developer and fixer?how we filter them and then?now just add the chemicals? tell me in short now i have the fixer and develope
I did this experiment one time so I could make a video of the process. It was time consuming, messy, and the yield was low. I’ve never worked with waste developer and fixer. I don’t even know if these contain silver. Sorry, probably not what you wanted to hear.
ooof i am kicking myself watching this, about 6 months ago i threw out 15+ kg of old x-rays I'd hoarded. this looks like a fun process, and damn, had no idea there was silver on them!
could you use fixer solution on unexposed film instead of bleach, then continue with the following steps and get silver?i ask because i have unexposed film and fixer solution and i know how to strip it but didn't know if i could use lye and sugar since i used fixer instead of bleach in my first step? thanks great video
I have an old full-length b&w feature film from the 1940's-1950's that went bad (smells like vinegar). I've been toying with ideas how to strip the silver off it. I could cut the reel and drop the whole film intact into a 5 gallon bucket and add bleach. This would allow me to hand squeegee the emulsion off it in a plastic tub. I could cut the reel half-way thru which would give me hundreds of little strips of film which would allow for better soaking but would be difficult clean them off unless I put them into another 5 gallon bucket with a lid and shook them or used a drill with a cement paddle. Any ideas?
I had to hand-dip each piece. If I tried doing more than one then they would stick together and trap material. No, I’ve only done it once to make video, so my experience level is very low. But I’m thinking that you’ll have to put your dilute bleach into a bucket, cut strips a foot long. Then dip into the bleach individually, and repeat. That’s what had to do. It’s very time consuming. But getting pure silver, from any source, is never quick, easy, or cheap.
I wonder, if having used glucose instead of saccharose you wouldn´t have gotten a better yield, since glucose has a reducing effect, which is also used in the Tollens probe when silver nitrate is instantly conversed to metallic (mirror) silver.
@@sreetips Hi I followed the video and got my silver today. However I can't wash the impurities on the silver in the last step. They just won't come off in my low heat solution. Could you explain what temperature you used to cook the silver in the solution of distilled water and sulfuric acid? How to let the impurities come off?
I started performing silver recovery with bleach but seems bleach made in egypt is bad quality,it couldn't strip the silver so I am doing it with hydrogen peroxide , is it ok with hydrogen peroxide ? I am surprised why bleach is not working out with me !
Excellent experiment .....that's what science is all about...but FYI you could get the silver quicker by drying out the 1st sludge and smelting it with NaCO3 and borax then pouring into a cone mold.Commercially the film is shredded and dumped into a very large vat of caustic cyanide with much agitation and aeration then electro-refined and the cyanide is reused.Of course you don't want to bring cyanide into a home environment but this process is easily scaled up to handle large quanities quickly.
I thought Drano was sodium hydroxide with bits of aluminum added. At least that is what it was back during my time in high school. Is it different now?
hey hey....can we get the silver product by using developer(whis is found in hospitals and body of radiology process).Now i think after i filter the developer chemicals then burn out and get the one i interested.What do u see bro?
Hi, I followed the same steps you did there with the same amount of x ray. All I get was 0.2 troy ounce. Can I know which step is crucial getting all the silver out? Maybe I should add hips of sodium hydroxide before adding in table sugar ?
This was really good! Now if we can find a supply of free x-rays and photo film I think we would be set don't you?! Thank you for sharing this it was great!
I think you lost a lot of material with the rinses. The silver was so fine to start with is there any chemical that would help condense it, like an gold amalgamate?
I wonder how much is in your waste buckets , and how much reaction did not finish ? Is there a test for silver in , during these processes - to see if the drop reaction is finished ? Thanks again
Would you do a video of a complete process of recovering silver from the keyboard mylars? I've seen a couple on RUclips but I think your methodological way of doing things will greatly benefit such a video.
mr .i just started my experment and the first bleaching step was succced and the second step was to be continued.because am just student and now have final exam and will have break in that time i wii finish even though it is tough work but in my experiment firstly i could get black solution so next step will be add concentrated hn03 in heating process then we will see.i have one question here have i to use only tap water? were u check that distilled water did not suits for this experiment? and i have other question may u are american or other citizen if u permit to ask..is there an education just type of repair electronics training and maintenance that end with half year?tell me please i want that feild. Temesgen Tenaw
I've only done this one time to make the video. I never added any HNO3. I added NaOH to the black solids. After that I added sugar to precipitate the pure silver powder. When working with silver in solution distilled water must be used. Tap water has chlorine. The chlorine in tap water will react with the silver in solution and form silver chloride. To avoid this I use distilled water.
PIEASE TELL ME THE way that i wil learn in usa by this feild please and how much year and monthes does it take to learn repair electronics training and professional technic training .it is easy to u because you knew most things about profession,and other things as far as your best knowledge.please tell me the payment may be the training education wii end with six month and one year then the payment will be how much dollar?the main thing that i learn this have sufficient reason because i want to make and do most things in this profession and in my country most things need should be done in the form of repair,transformation of trechnology like simple and complex. such and such.just u wil tell me after u inspect the training education in usa i will learn next month becaus i am ready to learn my forever wish.lastly if i want to learn in online i did not ask you because i want to know tangiable practical knowlede please tell me with excuse.when you do best work you know yow get good things it does not have research yeah,have anice time.
Not all film contained silver. Add some bleach to some water in a glass. Cut a small piece of film in question and dip into the dilute bleach. If it comes off then that’s a good sign. If it doesn’t then you’ll know.
Did a demolition in an old doctor's office and took to the shop over 1k lbs of xrays, a summer project and your video is the best put there. Common chemicals while others weRe asking for money for the chemical list, you shared this with us for free, thank you very much, great video.
Excellent Dave, the best of luck with your X-ray films!
Well, it's 3 full pallets, now that I moved them again it's more like 2k pounds. Willing to donate one full pallet to you and the channel, if you do a video showing what a 3 lbs plus of silver looks like, but it would take awhile, but worth it maybe for the channel and the cash. It would be cool to get a high school chemistry class to help you or something. Just thought I would offer, love your channel and I've learned a lot, the offer is there if you decide on it, but I'm in Detroit. Best wishes, and keep rockin.
Dave, thank you for the kind offer. Are you certain that the films are silver? Some processes use film that has no silver. I'll bet that a pallet of film weighs a ton.
Do you still have the old xrays? I'm planning a video for my son's science project and I have some xrays, but I could use more
There are some available on eBay.
I have prospected in the past. Now I have to find a new hobby. I went through a huge back surgery to correct my spine from scoliosis which eventually turned into dextroscoliosis . It’s been a quite a while recovering. All is good now. Just wanted to say thank you so much for all the hard work you’ve put into your craft and sharing with us.
Excellent. Glad to hear that you’ve recovered nicely. Thank you for your interest.
Dude that sreetips lab coat is badassery refined to .999
My brother I just died in April 2022, he was a chiropractor. He has years worth of x-rays I’m presuming 500 pound anyways, my sister-in-law is giving that to me. Just for this purpose… Thank you so much for the info!
Tip to cut the time removing silver from x-rays. The silver is only on the dull side. Put two sheets together back to back exposing both dull sides while dipping. I've been a photographer for 40 years.
For higher yield buy photographically unprocessed film , Silver halogen that is on the gelatin of the film was already used to create silver oxide ( the dark image on the film) hence creating negative image, Most of silver halogen (silver bromide ) was already regenerated to silver and stripped in fixer bath . Recovered silver remained in the hypo and you bought material that had less than 20 % of original silver content. I checked on Ebay for unprocessed Xray film and for the price you paid you could buy unexposed film and recover 5 times the amount of silver you received, You were correct to assume 2.5 oz of silver from 5,5 lb of film, but because most of the weight was in cellulose and silver had already been extracted before you bought it 1/2 oz is a good yield . I have been working for a large photo company for 20 years and silver recovery was part of my job. Recovery was done by methods other than bleach stripping, and hypo solution would yield 1 oz of purest silver per 1000 sq. ft of combined photographic paper and film processed.
Got it, thank you.
Hello. The conventional film are using developer to develop the image. Now the medical industry mainly use computered radiography which we call it CR film in Malaysia. Is it contain silver too? I have some sample photo of it. Thank you.
Khoohmkhoo956@gmail.com
Here's my mail. Thank you.
Damn! Thank you. Frkn Awesome
@Guodlca if it's legal doesn't make it ethical. But legal nontheless.
Hey look thats my spine on that film! I recognize it immediately. It was the only proof i have a spine and now it's destroyed forever!
Refining my own bullion and a retired paramedic. I would have never thought about x-ray film. I have no plans to either but it was a great and educational video. Thank you
I'm so glad I found your channel. I've said it before, it's a treasure trove of content and keeps me awake on my graveyard shift 😆....right smartly!
I’ve got to say I love your channel and all of these videos. Keep it up Sreetips!
Great information sir. I used to be a radiographer doing weld inspection. Since I'm a pac-rat, I have a lot of old film laying around. Lol I might try your process here and have a steak dinner. Thank you sir.
mad respect for the efforts
you make in the name of science and your hobby. 👍👍👊👊
I just re-watched . Can't believe this was 5 years ago.
This is probably my favorite. I watch from moon to moons.
Well in case you will repeat this recycling I suggest 2 faster methods like:
- Cut the plastic:
A paper shradder would be GREAT cheap and effective.
A paper cutter as you used for cutting the electronics fingers from those 150++ boards that you got more gold than you expected
- Bath the plastic:
I suggest using something short and larger so that you can put the plastic all inside without the need of tipping in-out something like OLD PHOTO DEVELOPING but bigger.
From what I can spot in the video, the silver would go away from the plastic very nice using a brush.
- Settling of the metals:
I think that some kind of "VIBRATION" would make the settling A LOT FASTER!
I would be nice to make a desk with a drill that is gently beating the undersurface of the desk, in this way all desk would slightly vibrate to facilitate the settling.
Hope that would be a nice addendum to your future X-ray silver recovery method ;)
I suggest he wet the emulsion and scrape it off with a razor blade . Just kidding
Hi. Thanks for the video. I have actually done the silver chloride/lye/ sugar methods a number of times. I like it. The largest batch I did was 40#'s Xrays from which I got about 2 ozt of silver. I used lye to strip the Xrays, It appears your bleach did it much quicker, so I may try that in the future. When it came to the sugar, Kyro syrup alone or with a little honey and water works great. Much quicker. If you put too much sugar in you'll have brown waste which is the sugar being carmalized. It has caused me not problems. If I can find the picture of the bar I got I'll post it. The yield you got appears consistent. I didn't expect you to get the couple ounces you mentioned in the beginning of the video with the amount of Xray film you had. It of course varies with the quality of the Xrays. Older Xrays (which mine were) have a denser coating on them compared to today's, that is if you can find Xray today with all the places going to digital. Thanks again for the video!
Excellent Scott, thank you.
have about 700 lbs of plastic film with silver on it after watching this video i think it will stay where it is seems like to much trouble for what is recovered a great project if you have the time keep up the great videos thanks again
Dipping these films took many hours. I was glad when it was over.
I think you did great I will look for a lot of videos and couldn’t find a lot to explain specially when somebody’s talking you through it makes it better it was maybe one or two other videos that was silent great job
Really like the video but can you explain what the purpose for the Sodium Hydroxide and table sugar? There are other videos show placing the silver sludge in a coffee filter and going straight for the melt. Much thanks
I was thinking that the sludge was a chloride since it came off with chlorine bleach. I used lye to convert the silver chloride to silver oxide - but I do not know if this was even necessary, it didn’t react like I expected, but this whole thing was a big experiment. After converting silver chloride to silver oxide (I think) then I added sugar to convert the silver oxide to pure silver metal. That seemed to work fine. But I may have had silver oxide before adding the lye - I don’t know. Silver oxide will melt into pure silver metal without the lye and sugar. I only did this once. I’ll probably never do it again. It was messy, time consuming, produced much waste that had to be treated before disposal and the yield was low. I couldn’t find a video on it. The videos that existed back then showed bits and pieces, then directed you to a web site and for a fee you could get the rest of the process. This disturbed me so I decided to do a video of the complete process.
@@sreetips I think you gave all of us what we needed and proved your point. The process was interesting and easy to follow and the result was spot on. Thank you...
I worked in the printing industry (four color pressman) for sixteen years years (1989-2005), and we always operated a darkroom to make film negatives for plate making. A company would come by once a month and collect the discarded film negatives and used developer solutions to recover the silver from. They collected these same materials from printing companies all over the Phoenix metro area, and they got them for free! I imagine that a tidy profit could have been made, since they are getting the silver bearing materials for free. A streamlined operation could be set up, and you could be in the black fairly quickly (I assume). It looks like quite a lot of film negatives and used developer is needed to produce an ounce of pure silver, but once again, if you're getting the materials for free, the bleach, sodium hydroxide, and sugar are very inexpensive. The most significant amount of overhead will be for labor. Unless you are doing this for yourself, you will need to pay someone to work your operation. You'd have to keep them busy, and process enough material to cover your expenses for chemicals and wages. I imagine that they were making money at it, since they were in business for the entire time that I was in the printing industry.
interesting as an educational purpose ! it gives sense on the word "recycling", thanks for all your work, i also enjoy all you videos about gold refining
Wow! I just realized that I have been watching you for over 5 years. The years have flown by!
I’ve been refining since 2010. Thirteen years!
This is a great video..many thanks, having worked in the medical X Ray industry for years, I have a good stock of X Ray film silver halide recovered from electrolysis units, I would say it is around 5kg....however it is like a fine black sand with a sulphur like odour, it is very dense and settles quickly in distilled water, IE it forms a sand like layer, but it is black and not grey like your metallic residue detailed here...do you have any suggestions how to process it to metallic silver ( it is definitely silver as it has come from recovery machines) thanks
In my experience, it may be silver oxide. Silver oxide is black in color, in my experience. If it were me, I would get a small sample, say about 100ml volume, and I'd put it in a crucible and heat it to 1000 degrees C or 1948 degrees F. Silver oxide, when heated, releases the oxygen and leaves behind pure metallic silver metal. Another experiment that I would try is to add a gram of sodium hydroxide to a 100ml sample of the black material, then stir and add some sugar. If it's silver oxide then I would expect to see the black silver oxide turn to pure elemental grey silver powder. This is what I would do, if it were me.
sir sreetips, your demonstration was so grate. i will try it thanks for you recovery.
whether bleach liquid for clothing can be used
and what is the second chemical component used
I used bleach for cloths. Then I see lye to turn the chloride to silver oxide. Then I used sugar to convert the silver oxide to pure silver metal.
Is borax needed during the combustion process?
He’s like Bill Nye, Bob Ross and Mr. Rogers rolled into one badass process chemist.
Whate kind of sugar did you use ?
@@husseinhamad2686 plain sugar that you would put in your coffee,white.
100 grm silver out put howmuch pound x ray film needs
There's no other Bill Nye but sreetips is still pretty good at this stuff
there is a some x ray film which is exposed by light but differ from
used x ray film so this kind of x ray film only washing by naoh and
filter then melt plus getting a product i think so because the silver is
accumulated mainly.Say something and start this project?
I learned a lot from this. Mainly, not to buy films from eBay. But I wish I kept the stack of old panoramic dental films I saw a few years ago get tossed. Maybe I can find a free stack again and refine them.
Someone made a comment about settling more with regards to your yield. I didn't expect 2 ounces from the amount of Xray film you had there from my experience, but I do think that making sure every bit is converted to silver chloride and letting the silver chloride settle until liquid is clear before decanting would've increased your yeild. Then at that point lye until dark black (from my experience) and no more reaction, then a liquid sugar like Kyro syrup diluted just a little and add until you start to get it very brown (excess sugar is carmelized) then rinse, let settle, and repeat until clear. Then you can be confident you have converted and recovered ALL the silver present. I would've still been surprised if you'd gotten a whole troy ounce but you might have recovered more. Still, I love your videos. Much respect!!
Scott its a film. It will have no silver chloride which is less sensitive and mainly is is used in contact printing, Film will contain Silver bromide or in rare cases silver fluoride , which will be the emulsion.depending on application.
Buying exposed/processed film by pound is like buying a goldfish with 5 gallons of water and paying per pound.
John Abramyan
Hi John. you missed the word **converted** the silver based emulsion is converted to silver chloride then converted to silver oxide by the lye, then to metallic silver by the sugar.
John Abramyan.
It’s called *yield*. If you know how many goldfish each lb of water yields you could purchase goldfish by water weight. Knowing that older heavier coated X-ray film gave me 2 ounces nearly pure silver from approximately 40lbs of film goes toward estimating “how much to pay by weight for that goldfish containing water”. 😉
When I use this process for developed black and white film ( which is what X-ray film is) I always use a vacuum filter before converting AgCl to AgO. There is always a gross amount of the emulsion and silverhalide carried over with this process.
Your yield was better than expected. Better than the same mass of keyboard mylars.
Hello sreetips my name is Yoem Diaz and I tell you that I have learned a lot from you, I saw some of your videos that I would like to know how many grams of silver came out on that occasion with only 150 grams.
here is the link of you tube
Silver Cell Build Step by Step From Scratch
thank you very much for what he does
Amazing. I had no idea that was that easy. I worked for a company dealt with recycling xrays, but we shipped them to a refiner. I was doing the math and it was impressive for a 25,000 pound truck load at a time. We did that every couple of months.
The yield was roughly 0.1 troy ounces per pound or 1 troy ounce for every ten pounds. So 25k pounds would produce 2500 troy ounces! It took me six hours to get the silver off of five pounds. 25,000 pounds would take me the rest of my life.
@@sreetips could you put the films in a sealed bucket with the bleach on a shaker table for a bit…. Then rinse. Bulk processing the material.
I tried doing several at once and they tended to stick together and trapping the silver.
Great demonstration, I've always wondered how silver recovery from film works. That 0.525oz is a much lower yield than I expected from over 5lbs of material, which is OK, because now I have a realistic idea of what to pay for this type of silver recovery scrap.
Thank you so much for taking the time to explore all of these different recovery and refining methods, and sharing your findings with all of us!
Do you have a Patreon or some account where I can make a monetary donation to help keep these videos coming?
Kyle, I'm not sure how that works. I'll have to get one set up. Thank you.
Which salts are added plz tell
Which Type of bleach is used ?
Thank you for this video. I had no idea that X-ray film contains silver *shy*. Once again thanks for investing your own money to show this to us :)
Ow yes. Also keyboard mylars.
Thank you for once again showing us another place to find silver:-)
Is there any silver left in developed color photos from the late 70's, 80's to 2000 ?(common photos processed from a Wal-mart or equivalent)? Thank you.
I’m not sure. Some films are thermal and have no silver at all
Love your videos. Its a GREAT hobby to have. Alchemy is alive and well.
Great video, thanks. Can I add to the calls for a video on the reclamation of silver in suspension please !
Years ago, when film development was manual, we use to sell the spent Fix solution for the modern equivalent of 20 Dollars/Gallon (with a lot of wheeling and dealing between us and the scrapman)
I was told by old heads that the process involved a trickle charge of current and produced 'Black Silver' - I've still got some 'Silver Estimating' papers somewhere...
i was also told that silver recovery from film was done by burning the excess away to leave silver behind - I've no idea if this was true, its just what I was told !
Fill a bucket full of steel wool and pour the fixer in stirring ever so often and then letting the silver bind to the steel wool....once all the fixer is gone and drained out rinse the steel wool with water and walla....there's your silver. I have over 5,000 pounds of film in my shop so I believe bringing it straight to the refinery works best for me.
BTW.....the steel wool has some sort of chemical electrical reaction to the fixer and silver so the silver binds to the steel wool.
Another great video, thank you for your teachings, you are the man!!!
Really informative. Learned something for sure.
What is the process if the x-Ray film is not developed? Other than developing it first, what chemicals are needed?
Sorry, I only did this once to demonstrate. I’m not sure of undeveloped films. But be aware, not all xray film contains silver. Some are heat activated.
well...........you may not be making any money on these demos but i think your still nothing less than a genious thanks pard
Great video!!! I am gonna be getting about 40 or 50 pounds of films soon!!
If I did this again I'd use a 5 gallon bucket instead of the small bucket that I used in the video. If I remember it took me 6 hours to strip five pounds! Good luck with it.
How can I do , if i use fixer solution to remove silver? Thanks
If the fixer has silver in it then you should be able to pull it out. How? I don’t know. No experience with recovering silver from fixer.
what was the role of adding the (sugar)???
Something to do with the carbon in the sugar. But I’m not familiar with the chemistry.
13:37 here you see a man MOVE'N with a purpose,,,,,,,,LOL ka-ching,,,,ka-ching.,,,,,Mrs Sreetips is smile'n.It's look'n alot like Christmas,that happy time of year.
Thank you for your time and efforts. And expence . Your efforts have saved us time effort and money. But most of all...thank you for emphasizing safety.too many videos out there gonna get someone sick or hurt.😎
Hey sir...did u know by what chemical we can precipitate the photographic chemical waste which have in photo house?...and in ur exp,t is it naoh is enough...using nacl03 is give us best silver?
I don’t know
Thanks a lot for this video but please I have a question, what is the white powder you added to the silver in melt dish before burning?
Borax, it acts as a flux.
And yet another great video! Very clear explaned and educative, thanks very much, I'll will be following you!
some other person tried bu using hno3 likeSilver recovery by chemical leaching depends on the heating of the film in the solution of oxalic acid (H2C2O4), nitric acid (HNO3), sodium hydroxide (NaOH), at boiling temperature for the separation of the inorganic component from the polymer layer. The development of X-ray film leads to waste from the fixer and from the aqueous solutions containing from 1000 to 10,000 mg Ag/L and respectively 50-200 mg Ag/L silver in form of thiosulfate complex how do u seen ?
Tem, you're way over my head here. I got this to work because I'm familiar with these reactions from my years of refining experience. I used bleach to get the silver off the films. I duducted that there was silver chloride in the material that came off the films. So I added NaOH to convert any silver chloride to silver oxide. Then I added sugar, just like we use to sweeten our breakfast cereal, to convent the silver oxide to pure elemental silver metal. Rinsed off all the sugar and lye, then melted the silver into a button. I bought those films for $100 on eBay because they were guaranteed to have silver on them. I needed them to make the video. Some films do not have silver. I don't know how to tell which do and which don't have silver. All I really needed to know is what solution was used to get the silver off the films. Turns out it's just regular household bleach. The rest is history as documented in my video. Good luck!
So which chemical in the bleach does the stripping as bleach is usually a combination of chemicals?
Sodium hypochlorite 6% solution
We used to recover silver from the fixing bath of black and white film development. We used powdered zinc to precipitate the silver out of the solution. Allowing the zinc silver mix to settle out we would recycle the fixing bath and allow the mud to dry. This mud can be smelted to separate the zinc from the silver.
Smelting is a term used to describe extracting metal from ore. To seperate the zinc and silver, both are dissolved in hot dilute nitric acid. Then copper metal is introduced into the acidic zinc/silver solution. Zinc, being above copper in the reactivity series of metals, will stay in solution. Silver being located below copper in the reactivity series of metals, will cement (precipitate) out as nearly pure silver metal as a grey powder that looks like wet cement. This is where the term "cement" comes from. (Edited once for spelling).
Great video!! I was wondering if you could use this process to strip old cds and dvds instead of using caustic soda?
The bleach batch you used are of what content each ie each bottle content is how many ml, or I should just get a gallon and empty into the bucket.
Secondly the bucket that have water in it, it is just water or a combination of water and something else?
Thanks as I await you response.
I can't remember. I think I added 1/2 gallon of bleach to each bucket.
HAVE I TO USE PURIFIED WATER OR DISTILLED WATER WHEN WORKING THE SILVER RECOVERY?
Not in the bleach you dont
Great video, I'm just wondering if shredding the xrays then dropping in a bucket of bleach and stirring would not maybe save a bit of bleach or cutting into smaller squares so that they can all get dropped into the bucket at once?
Excellent video. I wonder what one would get as yield from soldered copper pipe ends, since that type of solder contains silver. Not to mention solder that is sucked off of old print circuits. I gather quite a bit of it working on electronics, especially vintage electronics where parts are soldered to contact bridges.
Thanks for your sharing your knowledge and video.
It was entertaining and interesting
I bought some silver solder from the welding supply store. I've had it for about two years now. A whole tube of it for about $50 bucks. I had forgotten all about it. It would make a great video. Thank you.
I would put those through a heavy duty shredder first. Very interesting salvage process 👍
Shredding will be a wasted effort, because the coating on the sheet contains silver. That needs to be submerged to dissolve it in bleach or Nitric acid...
Would this also work for keyboard mylars?
I don’t know, I’ve never processed keyboard mylars
I had to do some wastewater testing for an industrial permit at a college and one part was for the building for dental hygienists and nurses. Figure chemical treatment system along with silver recovery systems for the Xray and dental areas. Even in the wastewater pipes leaving the building I could detect silver. The worst part, the copper pipes for the drains from all the HVAC units. The pipes from the labs were glass and no problems with the chemical system.
Thank you so much For doing that..
Yes you demonstrated how to extract the silver and also gave us kinda a formula to go by when doing ut ourselves and wether or not its worth it to follow the project all the way through or not....
That's assuming that all x-rays are generally about the same in their silver content...
I would love to invest to get started...
But the way things are going right now..
I am building a gravity fed water filtration system..
So we can have clean water..
Things are so different anymore..
The carefree days have vanished..
These are different times..
I think a good water filtration system will be the smartest thing i have ever done...
Even better than college..
Ha ha ha ha ha ha.
Well the smartest thing
Next to making colloidal silver..
Have a nice evening
The film your using is considered wet do you have a procedure for dry view? I
I do not. I bought this online just to make the video. Some X-ray film contains no silver at all. I bought this because it was certain to have silver. I don’t know how to tell the difference
May bleach strips silver off from brass, cooper, aluminium base metal ?
I don’t know I’ve never tried it. Chlorine bleach will react with silver and form a passive layer of silver chloride
Thankyou I enjoyed watching that unfold
Great video. Thank you very much for your wonderful video.
Exelent job man!!!
Hi, i see you there😁😁😁
Mister ..Can i try this methode to unexposed x ray film?
I don’t know.
This is really cool! Is the bleach still usable?
I only did this one time. So my experience level is low.
What would happen if I added silver chloride to a batch or silver nitrate?
You’d have a mixture. Silver chloride is not soluble in silver nitrate.
i have one idea that is after we clean the x ray film can we reuse the x ray film
if you know the step tell me the way having after the waste developer and fixer?how we filter them and then?now just add the chemicals? tell me in short now i have the fixer and develope
I did this experiment one time so I could make a video of the process. It was time consuming, messy, and the yield was low. I’ve never worked with waste developer and fixer. I don’t even know if these contain silver. Sorry, probably not what you wanted to hear.
ooof i am kicking myself watching this, about 6 months ago i threw out 15+ kg of old x-rays I'd hoarded. this looks like a fun process, and damn, had no idea there was silver on them!
could you use fixer solution on unexposed film instead of bleach, then continue with the following steps and get silver?i ask because i have unexposed film and fixer solution and i know how to strip it but didn't know if i could use lye and sugar since i used fixer instead of bleach in my first step? thanks great video
I'm not sure about that because I've never done it.
@@sreetips is there a certain type of bleach you have to use? just regular store bought bleach?
Regular store-bought bleach.
I have an old full-length b&w feature film from the 1940's-1950's that went bad (smells like vinegar). I've been toying with ideas how to strip the silver off it. I could cut the reel and drop the whole film intact into a 5 gallon bucket and add bleach. This would allow me to hand squeegee the emulsion off it in a plastic tub. I could cut the reel half-way thru which would give me hundreds of little strips of film which would allow for better soaking but would be difficult clean them off unless I put them into another 5 gallon bucket with a lid and shook them or used a drill with a cement paddle. Any ideas?
I had to hand-dip each piece. If I tried doing more than one then they would stick together and trap material. No, I’ve only done it once to make video, so my experience level is very low. But I’m thinking that you’ll have to put your dilute bleach into a bucket, cut strips a foot long. Then dip into the bleach individually, and repeat. That’s what had to do. It’s very time consuming. But getting pure silver, from any source, is never quick, easy, or cheap.
I wonder, if having used glucose instead of saccharose you wouldn´t have gotten a better yield, since glucose has a reducing effect, which is also used in the Tollens probe when silver nitrate is instantly conversed to metallic (mirror) silver.
Would it be possible to get the full chemical formulae breakdown for the process, each reagent step at a time?
I put it all in the video. It’s all there.
@streetips Can you re use the bleach in this process??
I don’t know - probably not. I only did this once to make the video.
I wonder if this would work with silver mylars out of the keyboards
Some one has posted a comment stating that it would work on myylars.
Do you repurpose the remaining plastic plate?
I’ll find a use for it
This video is fantastic! May I ask you what is the white powder that you added in the very last after you roast the silver using torch lighter?
That was some borax
@@sreetips Thank you!
@@sreetips Hi I followed the video and got my silver today. However I can't wash the impurities on the silver in the last step. They just won't come off in my low heat solution. Could you explain what temperature you used to cook the silver in the solution of distilled water and sulfuric acid? How to let the impurities come off?
can we use the cleaning x ray film again like original x ray film ?
I started performing silver recovery with bleach but seems bleach made in egypt is bad quality,it couldn't strip the silver so I am doing it with hydrogen peroxide , is it ok with hydrogen peroxide ? I am surprised why bleach is not working out with me !
Rafik, some films are thermal and do not have silver. I've never used hydrogen peroxide so I don't have any experience there.
Can we use bleaching powder
I’ve never used bleaching powder - I don’t know
Excellent experiment .....that's what science is all about...but FYI you could get the silver quicker by drying out the 1st sludge and smelting it with NaCO3 and borax then pouring into a cone mold.Commercially the film is shredded and dumped into a very large vat of caustic cyanide with much agitation and aeration then electro-refined and the cyanide is reused.Of course you don't want to bring cyanide into a home environment but this process is easily scaled up to handle large quanities quickly.
I thought Drano was sodium hydroxide with bits of aluminum added. At least that is what it was back during my time in high school. Is it different now?
I didn’t use draino I used straight sodium hydroxide drain cleaner.
@@sreetips I know. I asked the question because you said not to use Draino.
hey hey....can we get the silver product by using developer(whis is found in hospitals and body of radiology process).Now i think after i filter the developer chemicals then burn out and get the one i interested.What do u see bro?
I don’t have any experience with that
Would using nitric acid produce a higher yield?
I don’t know. I only did this once to make the video. It’s was messy, time consuming and the yield was low.
Hi, I followed the same steps you did there with the same amount of x ray. All I get was 0.2 troy ounce. Can I know which step is crucial getting all the silver out? Maybe I should add hips of sodium hydroxide before adding in table sugar ?
I only did this once. Not much experience.
Does the bleach process work on keyboard mylars?
I don’t know, I’ve never tried that.
This was really good! Now if we can find a supply of free x-rays and photo film I think we would be set don't you?! Thank you for sharing this it was great!
I think you lost a lot of material with the rinses. The silver was so fine to start with is there any chemical that would help condense it, like an gold amalgamate?
Not that I know of
I like this video and teaching method. Thanks.
I wonder how much is in your waste buckets , and how much reaction did not finish ?
Is there a test for silver in , during these processes - to see if the drop reaction is finished ?
Thanks again
What are the names of the last material to polish the silver
Would you do a video of a complete process of recovering silver from the keyboard mylars? I've seen a couple on RUclips but I think your methodological way of doing things will greatly benefit such a video.
It's probably the same process with even less silver to get.
Oh, O.K.
mr .i just started my experment and the first bleaching step was succced and the second step was to be continued.because am just student and now have final exam and will have break in that time i wii finish even though it is tough work but in my experiment firstly i could get black solution so next step will be add concentrated hn03 in heating process then we will see.i have one question here have i to use only tap water? were u check that distilled water did not suits for this experiment? and i have other question may u are american or other citizen if u permit to ask..is there an education just type of repair electronics training and maintenance that end with half year?tell me please i want that feild.
Temesgen Tenaw
I've only done this one time to make the video. I never added any HNO3. I added NaOH to the black solids. After that I added sugar to precipitate the pure silver powder. When working with silver in solution distilled water must be used. Tap water has chlorine. The chlorine in tap water will react with the silver in solution and form silver chloride. To avoid this I use distilled water.
PIEASE TELL ME THE way that i wil learn in usa by this feild please and how much year and monthes does it take to learn repair electronics training and professional technic training .it is easy to u because you knew most things about profession,and other things as far as your best knowledge.please tell me the payment may be the training education wii end with six month and one year then the payment will be how much dollar?the main thing that i learn this have sufficient reason because i want to make and do most things in this profession and in my country most things need should be done in the form of repair,transformation of trechnology like simple and complex. such and such.just u wil tell me after u inspect the training education in usa i will learn next month becaus i am ready to learn my forever wish.lastly if i want to learn in online i did not ask you because i want to know tangiable practical knowlede please tell me with excuse.when you do best work you know yow get good things it does not have research yeah,have anice time.
u mean suger means sucrose ,glucose is it? i know already u told me last time but it look like joke.
Sugar, just like we use to sweeten our tea or coffee.
hey hey.....u fine am tom mechatronics engineering student,i ihave one question how much will take time when we use naoh to clean the silver
This experiment took way longer than I anticipated. A high volume of film would be tough to do for the amount of silver it yields
How long did it take to melt with the torch you was using?
Maybe about 5 minutes.
I have 200+ lbs of exposed duplication film & approx 100 lbs MRI film. Will this yield be about 1/2 because of single emulsion?
Not all film contained silver. Add some bleach to some water in a glass. Cut a small piece of film in question and dip into the dilute bleach. If it comes off then that’s a good sign. If it doesn’t then you’ll know.
@@sreetips Thanks!!!