Pressure Pot vs Vacuum Chamber | Resin Dice Casting
HTML-код
- Опубликовано: 3 окт 2024
- In this video, I go over the differences in Pressure Curing Resin for Dice Making, vs using a Vacuum chamber to remove the bubbles in your resin.
In essence, you can do EITHER, but the pressure pot works BETTER at getting you a consistent results with your dice making, with a lot less work on your end. Just put it in and forget it.
When curing with a pressure pot, the bubbles in your resin/silicone casting become so small, that they can't be seen by the human eye. When using a vacuum to remove the bubbles from the mold in your casting, you pull the bubbles WAY too far out of the mold, leaving you with not enough resin to finish your casting.
Now you CAN vacuum out the bubbles, and then pour it, but you run the risk of just adding bubbles at that stage anyway.
So really, my money is on getting a pressure pot over a vacuum chamber. It does two jobs, and I'm told that it can cure your silicone for your molds in the same way, but I have yet to try that myself. So take THAT part with a grain of salt.
Amazon Affiliate Link to the resin material that I used. Available in smaller batch sizes as needed: amzn.to/2KXlUkY
Amazon Affiliate Link to the mold material I used: amzn.to/2zccY5P
Amazon Affiliate Link to the Vacuum Chamber Kit: amzn.to/2PGwPU6
Harbor Freight Pressure Pot that I use/adapted for Resin Casting: www.harborfrei...
If you like twitter, I got one! / rybonator1
I also have an Instagram! / dm_rybonator
If you have any ideas for what you would like to see built/reviewed in the future, let me know in the comments down below! Then subscribe so you don't miss any new videos coming out in the future! Also, if you liked this, gimme that sweet sweet like.
MUSIC:
• "Renaissance Period" "...
"Renaissance Period" "Music For RUclips Videos" "Royalty Free Music"
LAKEY INSPIRED - Better Days
• LAKEY INSPIRED - Bette...
Resin Safety Data Sheet: cdn.shopify.co...
I don't have a pressure pot so I can't judge it. But the vacuum works for me. The problem with all the guys that test the vacuum with resin is that you let the resin overflow. You don't have to do that. You can first degass the resin in a separate container and then pour it into your mold. Also you can adjust your molds so that your resin can overflow a little bit. You also must let some air go out before the overflow, then stop the process and then repeat a few times. You don't have to fully degass the resin to have a clear cast with a naked eye. It definitely works for me and my projects are proof of that. Anyway that's must my honest opinion! :)
That's a totally fair and good point! I was wanting to show the difference in the set it and forget it style. BUT if you are willing to do the adjustments or watch the vacuum, it works just fine. Thanks for the tips :)
@@Rybonator im sorry but you cannot use the same procedure when doing 2 completely different things. This is as if you would try to show flaws with the pressure pot by putting pressure on the resin before pouring and then "setting and forgetting". Its obviously not going to work due to what you are trying to accomplish and the materials you are using.
Also degassing the resin beforehand in a bigger container could be seen as easier since you can pour a lot more quicker and cure outside the chamber.
Honestly I don't have either but even I was skeptical of his method while watching. I wanted to get my husband a vacuum chamber years ago for his mini dnd figures he makes but I never did. Then recently I started looking into ways to make dice, as a hobby gift to him. But when I saw this I was shaking my head saying "This feels so bias. That's too long isn't it?" Thank's for clearing this up. I think I'll need too look at more comparisons still. lol
Would it be possible to take advantage of both processes? I would say:
1) eventually cool down the resins A and B before mixing, to have a longer pot life,
2) use the vacuum for a little while to remove a good portion of the air, going slowly, progressively for 5-15 minutes to prevent overflow. I suppose you can this way at least reach 0.1 bar, which means 90% of the air is gone.
3) then apply pressure and let the resin set.
Would this process give a clearer result than using only pressure?
One more question linked to the previous, and also for those without budget to buy both devices:
I understand that you cannot at all apply pressure in a vacuum chamber, but is it possible to apply vacuum to a pressure chamber? I don't see why (apart maybe a question of connector) you could not do that....So, with my process above, you would not have to move your mold between both stages!
I have zero practice in casting resin, but I am an engineer, I don't understand why applying pressure works so well...
From physics, the volume of a gas is inversely proportional to pressure (PV=nRT, so at constant temperature, Pressure*Volume=constant ), which means if you go from 1 bar (ambient pressure) to 4 bars (read 3 bars on the manometer since graduated a 0 for ambient), you then multiply the pressure by 4, so the volume of the bubble is divided by 4.
The volume of a sphere is (4*Pi*R^3)/3, so a sphere B of 1/4 of the volume of a sphere A has only its radius diminished by cubed root of 1/4, which is 0.629 .
So, by applying 3 bars, the spheres should have their radius not even twice smaller...
This is all in theory. But pressure has long proved that it's working, so I must be wrong somewhere...
Notice here that I am thinking while redacting....
...Now I have checked: your explanation of why pressure is working is partially wrong: the bubble are not disappearing because the pressure are pressing on them, reducing their volumes, but because the capacity of the liquid to dissolve the gas depends on pressure. It's what happens in a bottle of sparkling water: when it's still under pressure, the water is perfectly clear because the gas molecules are intimately mixed with the liquid, there are no bubbles at all. When you open the bottle, the pressure is reduced, and the bubbles appear.
So my previous post should be wrong, no need to apply vacuum before pressure, if it's dissolved, it is clear, it cannot be clearer.
But it should also explain why you can apply pressure to silicone: once the bubbles dissolved, there are no bubbles at all, just gas molecules trapped in the solidified matter, that cannot grow bigger.
It should also be a track to test whether it is useful to apply a deep vacuum to get rid of the bubbles. As soon as you have de-saturated the liquid (let's say at 0.5 bar), when the pressure is back the excess air of the original bubbles should dissolve, and any bubble disappear. May be this could avoid many spill out...
Best explanation of the difference between using a pressure pot and a vacuum chamber for resin projects that I have seen to date, and he didn't spend an hour telling it either. Well done.
Thanks Jamie! :)
Perfect video. The only one I found covering everything; and gladly. Exactly the video I needed 4yrs later. Thank you ❤️🙏🏾💪🏾
I want to point out there's a flaw in your methodology here.
1) You don't need to pull a vacuum that long. 1 maybe 2 minutes is sufficient
2) You don't pull a vacuum on the mold. especially if it's a silicone mold, as bubbles trapped in the mold can expand, and deform ruining the casting. pull the vacuum on your resin before pouring, and be gentle and steady with your pour.
3) When you pull the vacuum, you are drawing trapped gasses out of the fluid, when you release the vacuum, remaining bubbles collapse (such as when you are applying pressure) Because of atmospheric pressure.
You pull the vacuum to remove the bubbles, then pour it into your mold. No need to maintain a vacuum.
With the pressure method, you have to maintain pressure during the curing process, or the bubbles will simply expand again before the resin has set.
The biggest difference here, is equipment usage. With a pressure system, you can only work as many pieces as can fit within the vessel at a time. With a vacuum system, you can cycle more pieces at a time, by vacuuming the resin, then pouring it, you considerably increase .how many pieces you can work with at once, as well as produce a better end result.
Pressure does NOT cause the bubbles to completely disappear, and depending on how many bubbles you've formed during mixing, could leave the piece with far too many occlusions.
Finally.. a combination of the two processes would result in near flawless results.
As with anything in life, the effort you put in, is the proportional to the results returned.
This is absolutely right! I have since been more educated about the process since this video's inception.
My main concerns with pulling and releasing the vacuum, were 1, it takes more effort than the set it and forget it of a pressure pot. And 2, I was worried about running out of time when degassing, and my resin starting to cure. Because I've never had an issue with bubbles in my dice after the pressure pot, even with a HUGE amount because of my sprue molds, I never have bothered with both results. If I was making these for a museum quality replica, I would probably go with both methods now, but as this is just a hobby, I'll stick with what works for the time being :) Thank you for the tip!
Firstly, thank you for an educational video and comments. My question to your reply on degassing the resin before pouring in the mold is what happens when you cast a highly detailed mold? Air would still be trapped in the mold no? So surely from an efficient point of view it would simply still be better to pressure cast?
Secondly, how do you clean your pipettes after casting?
Thanks!
@@benjaminhowell6920 You just throw away the pipettes, normally. :P Getting resin out of those would be an ordeal!
So just put the cup of your resin in the chamber and let the bubbles rise before pulling it out?
@@Rybonator ArcAiN6 said in point 2) that you shouldn't pull a vacuum on the mold, because it could ruin the casting. In your previous video (part 1) you achieved a great outcome with that method. Would you stick to that method or did you ever experience any deformations in your molds?
how can a completely clear D20 look so beautiful?
...i may have a dice addiction.
Then you have come to the right place! haha :)
This is super straight-forward and helpful! I can't find any type of pressure pot available for purchase in Norway, so I was thinking of just getting a vaccum chamber - but now I know that wouldn't be ideal! Thank you for saving me the time and money (':
Hi! Jula sells something similar as calling it a "trykkfat" No idea if it is any good though, reviews seem kinda bad.
Glad to help where I can :) Best of luck in your casting journey!
The one from Jula looks like the same one as Robynator uses in his videos. All the reviews pertain to bad O-rings in the hose for the paintgun(easily fixable) and should not interfere with using it for resin-casting. As far as i've understood the reviews atleast.
You can still use a vaccum chamber. However you need to pull the bubbles out of the mixture before you put it in the mold. Both can work, its just that they have two different methodologies.
pressure cooker you would use on your stove can be a good start. I am using a pressure pot used for painting. ck HF store. or amazon
This was insanely helpful! My husband and I have been researching and couldn't find any clear cut answers. You're awesome.
Well thank you :) I'm glad you found it helpful!
how I mean this in the best way possible, but there is nothing that puts me to sleep better than your videos! If I need a nap, I just put on your dice making playlist and I'm out. Super relaxing, and a very nice voice!
Honestly that is one of the best compliments that I have received :) I love listening to maker vids to fall asleep to, and I'm glad I can provide that for someone else. Have a great night's rest my friend!
I've just started wading into the whole mold making and resin casting scene, and this video helped clarify the pressure vs vacuum topic immensely. Thanks!
Glad to help where I can :) Welcome to the hobby!
I love how informative and educated this video is, this video deserves more likes.
When you pull a vacuum, as the bubbles start rising, you let air back in, that'll pop the bubbles and let the resin sink back down. Repeat til there's no bubbles.
Yes absolutely! It's more labor intensive than a pressure pot, but doable. You still have to worry about adding bubbles back in during the pour, as well as possibly running out of time as the resin begins to cure, but doable!
@@Rybonator longer working time resin should help, yes? I'm not sure how many options for resin are out there that have the structural or visual qualities you're going for.
Indecisive Fom what I notice the vast majority of resins on Amazon are fast cure. You need not just slow resin for degassing, but very slow resin which is harder to find and probably more expensive. For what he’s doing and the type of resin he’s using it probably is better just to pressurize.
@@noelr9376 the opposite for me. The only resin I can find are slow cure epoxy.
mrjutsumaster I’m not talking about cure times, I’m talking about the working time of the epoxy before it begins to gel. Please tell me where you are finding an abundance of slow work time epoxy. Most I see are 15 minutes or less.
excellent vid! I cant tell you the number of times ive explained this to people, seems like every other day someone is asking about pressure/vacuum in resin casting. Now i can just send them the link to this video! Very well explained.
Glad you found it helpful :) I had a lot of people asking in the comments on my previous vids, it was just easier to make this one to show people, as a visual is just a better tool!
4:17 you said "one of the dice" not "one dice" so it actually is correct
ONE DICE is not correct.
ONE DIE is correct however.
@@ostyx4037 he said ONE of MANY like "one of the children" or "one of the animals"
Ah ok.
Dice.
Lawful good grammar nazi
I can't even get my corrections for that right lol. Thank you for the clarity :)
Thank you for breaking it all down and showing us the results for our specific application! I have been wondering why not to just use the vacuum chamber for everything, as in theory it would be better. But now I SEE why to use a pressure pot.
It really helped me to visualize it as well when I first experimented :) Glad you found it useful!
I would like to add an addendum to the "pressurizing" segment: The amount of pressure in your pressure pot isn't enough to account for the level of shrinkage in the bubbles.
For example, let's say you live at sea level (14PSI) and you pressurize your pot to a very generous 60PSI. That's roughly 4x the pressure. Our Ideal Gas law states that if you increase the pressure by 4x, you reduce the volume by 75% (4x the pressure, 1/4 the volume). Diameter is a function of the cube root of the volume, so a 1mm diameter bubble will be reduced to 0.63mm. That's still more than half the diameter, and would be pretty visible.
However, increased pressure also results in increased *solubility* in a solvent. Think when you open the cap on a pop bottle, all the bubbles come out. That's because the pressure inside has been reduced, so the carbon dioxide is less soluble in the water, and gets released. Now, epoxy resins are made of pretty reactive materials. That's *why* they turn from two liquids into a solid, and release heat in the process. It's also why un-cured resin is actually very toxic, and why some things can cause the resin to "inhibit" and not cure properly. Increasing the atmospheric pressure also increases the solubility of air into the liquid resin by about 4x.
So basically, my assumption is that the increased pressure causes the air bubbles to be absorbed into the resin the same way carbonation is into fizzy drinks. This, plus the internal stresses that pressurization adds, does reduce the physical strength of the cured resin, however most epxoies have such a high tensile strength (usually 1500PSI or more) that this isn't really a problem.
Generally what I've gathered is: You want to vacuum-degas silicone molds (partly because silicone usually just has a longer working time and won't set in the middle), and you want to pressurize your resin (because most molds don't have enough overflow capacity, and the set time is fast enough that you can get stuck in the middle somewhere.)
Also, comments on technique: You want to actively watch your vacuum chamber and repressurize whenever it gets close to overflowing. This is tedious, but will help prevent overflows.
I have no idea if what anything you just said is true but I have been searching for some kind of answer to why pressure pots work because there is no way air compresses that much especially at like 40psi. I'm just a layman but apparently nobody has really done the science on it, that I can find at least.
It's not something that's easy to research, since it's kind of hard to really test for such things when the solvent is under pressure. The best I can really say is "It makes sense," but that's admittedly not a very good barometer for factuality.
Maybe we could convince someone like NileRed or Cody's Lab, who actually have some fairly extensive chemistry knowledge, to come up with some experiments.
I love your explanations, very detailed and easy to follow. Thank you for the addition to the knowledge :)
There is also a bit of natural shrinkage that happens when resin solidifies and cures, which also plays a part in the overall reduction of volume. This in combination with the bubbles and your explanation create the results that we see. :)
Thanks. Fortunately, I have some work experience explaining technical things to nontechnical people (I would like to emphasize, not *stupid* people. My boss is very intelligent, but her expertise lies in running a store. If she had technical expertise, she wouldn't need me.) but I know I can get extremely wordy and dense sometimes.
I've had a few people say they think I would make a good teacher. To which I respond, "No, I would make a terrible teacher!"
Ultimately, though, I just love talking about the things I find fascinating, and spreading the knowledge I've accumulated. Perhaps, in some way, it's my own bid for immortality, that a hundred years from now, the things I once knew will still be remembered. I'm glad people seem to appreciate it.
Absolutly yes to bring gases into solution. With the cured resin I'm really not sure what happens with the trapped gases. Maybe they just difuse over time. I don't think they really bring any stress to the material. Frozen cola does not crack and break when you open the bottle, but as its melting, the gases also get released and bubble out. Do you have any resources to that topic? I found nothing so far about pressurized resins and the impact on material properties.
I was really close to buying a Vaccum and pressure pot but now i'll wait until you upload a silikon mold made with pressure instead of vacuum. From an egoistical point I'd like to ask you to do that soon!
Love your videos! always a great help and very straight forward! Keep it up!
I might have to up the schedule I had planned for that :) Glad you find my stuff useful. Thanks for watching :)
It was both informative and entertaining! So mission accomplished both tasks set forth for you. Good job Dice lord!
Thank Murl! I always look forward to your comments :)
I am FINALLY going to make dice and the first tim I was going to make dice I found your channel...so thank you for making your channel 😌
Happy that I can help :D
I was having a problem with my silicone molds and decided to try my pressurepot. It worked like a charm. No more little bubbles on my castings!
Fantastic! I plan to show that in a future video as well, so I'm glad it worked for you before I try haha :)
Depending on the working time of your resin you could do both, first vacuum before the pour then pressure after filling to minimise any added bubbles. This route is obviously more expensive and time consuming but it would be an interesting experiment...final word though I do agree for simplicity/result/cost effectiveness go with a pressure pot
Absolutely you could! And I'm sure some meuseum quality resin displays of art probably do this to ensure that their work is perfect :)
Shoutout to TheCrafsman! I love his videos and I'm really liking yours since I came across them!
Hey thanks! Glad you like them :) I have some crafsman inspired stuff coming up soon!
I’m diggin “The Craftman” reference less than 5 mins in… I’m hooked now.
Yes I was waiting for this type of video! I want to get into dice making and I've been wondering about this. Thank you so much!
Glad I could help :) Thanks for watching!
Rybonator also wanted to tell you, I did read somewhere that a pressure pot doesn't help with bubbles for silicone type things. Not sure if it's true or not but thought you should know
excellent explanation! I use both silicone and resin so probably need both a vacuum pump/pot and pressure pot. I also need to purchase an air brush compressor. This is quite a bit of equipment so I am trying to research how to economically buy all of it. But pressure is best for clarifying resin and good for resin poured into silicone molds. Silicone is better to de gas in vacuum.
I feel like it's also worth noting that your example used a simple form that allows the bubbles to rise straight out of the top of the mold. In many cases the mold will have air trapped inside that won't simply rise to the pour hole. It will expand and stay inside the complex form unable to rise out. Thanks for the video! so cool.
This is exactly the kind of video I hoped you would make, I was wondering about this, and now I know the answer! :)
Glad it was what you were looking for! :)
And here I thought my plans to diy a vacuum chamber was a bad option. Thanks for this!
DIY vacuum is a safer option than a DIY pressure pot at least haha a:)
Amazing, thank you. Before I thought a vacuum chamber would be a better idea because removing the bubbles sounds better than making them smaller, as long as the resin didn't set before it did it's job, but didn't consider it expanding like that.
I don't know if you have considered this but it would be so cool to see you make beginner tutorials. Like how different resins compare pressure pot vs vacuum with silicone. How to dye resin and different ways. I know you've shown how to do these in your videos but videos just dedicated to those would be really cool!
I absolutely plan to make a beginner video soon :) I wanna show the steps from the very beginning for beginners to above!
@@Rybonator that's fantastic I'm looking forward to it 😊
This would be extremely helpful. My 13 yr old nephew wants to start this hobby. Not sure what items he would need the most, essentials.
the video was very informative and cleared up my questions re pressure pots and vacuum chambers, thank you!
This is super helpful, was just considering getting a vacuum chamber, so, yes super helpful.
Still a useful tool! But a pressure pot is just more bang for the buck :)
Would definitely recommend the vacuum chamber! Might be a bit more work but definitely more proper. (And overall can be cheaper).
The use of of the vacuum pot is to pull the bubbles out of the epoxy before you pour the epoxy into the molds. Yes, you may introduce bubbles while pouring, but they will not be as bad.
True, but you could still overflow from your cup, and you might introduce some bubbles, AND you have to worry about cure times in your resin while you are doing that, and it's labor intensive instead of set it and forget it. But it can work :)
@@Rybonator if you want the best finish, you have to pull out as many bubbles as you can before make them smaller with the pressure pot. Overflow problems? You just have to use a 3 to 4 times the volume of the resin cup, pour the resin into the mould, and compress the small amount of bubbles left. Only by using both methods you will achieve a perfect copy of your models. If curing time is a problem go for another slower curing time resin. I consider that is not fair the fact that you only show a resin cup and a mould overflowing everywhere, it is just a wrong way to proceed and a lot of people who are starting casting can be confused. I have to dislike this video dude, it just shows wrong content.
It was really interesting to see the difference between them!!!
I love watching the vacuum being pulled on the resin haha :)
Dear Sir,
Your not wrong to say "one of the dice". Because it is one of a group and the group should be plural. If I have 10 cats and want to pick up one, I will pick up one of my cats, not one of my cat. Your usage of the plural in this case was correct.
Thank you for coming to my Ted talk.
Thank you for this! We'd been wondering which to get, and this definitely finalized it. Now...to just get the money for a pressure pot and compressor.
Yeah they are not a cheap investment, but if you are planning to sell your dice ever, I 100% recommend it :) Can't wait to see what you create with them when you get em'!
Oh man, you just saved me of buy the wrong way to cast my resine, thank you so so much
Of course! :)
Thanks for clear explanations. Exactly what I wanted to know regarding resin casts, in a way I could understand without feeling like an idiot 👌
Glad I could help in some small way :) I'll do the feeling like an idiot, so that you don't have to haha
Solid work Professor Rybonator! This was great.
Please, Professor Rybonator is my father!
You can call me Doctor Bonator.
Also thank you lol :)
I would LOVE to make my own dice someday, so knowing this information is vital! Thanks for saving me money (in the future when I actually have the funds to buy my equipment lol)
Of course! Happy to help in some small way. Can't wait for you to get the equipment! You are gonna love it :)
Great video. The vacuum seemed like the more intuitive method so I wondered why you were using the pressure pot. I am sure glad that I didn't buy a vacuum chamber last week.
Pressure pot all the way for dice making! Though you CAN make a vacuum work :)
I was cackling. I have seen enough TKOR to know what a vacuum chamber would do, but thank you for the educational vid none the less!
Glad you found it educational, even if it made you cackle haha :)
Fast forward to future episodes when he shows ways to use the vacuum chamber and not lose any resin and do it much better lol.
This was certainly informative, I'll be sure to keep it in mind if I ever get to work with resin
Glad you found it helpful :) Thanks for watching
Rybonator love your videos and you inspired me to get into the molding and casting . My first set of molds produce the same results of rough surfaces when pressure cast. So instead of putting the silicone into a vacuum chamber, I put set #2 to cure in pressure pot at 50 psi and produces very good results
I actually have a demo of that planned for my next video! I got the same results :) Good to know great minds... get similar results haha
My last batch of silicone I used was clear but I misread the viscosity. It arrived and I saw how thick it was (very close to caulk from tube). Being a 2 part mix it was strewn with air bubbles. I figured I would give it a shot and see just how good a pressure pot was. Low and behold a clear mold was produced. Wish I could post pics of the initial and final results for you
You pull a vacuum on the resin before pouring , never while its in the mould!
Oh absolutely! You absolutely could pull, release, pull, release etc, but it both takes practice, and is more labor intensive (If you wanted to do it in the mould). Not to mention that you have to worry about your cure times if you don't degass fast enough. Compared to the set it and forget it pressure pot, I just prefer it :) But it's a totally valid, and probably proper, method! But yes, vacuum before pouring :)
vizionthing 7:36 dude. Next time watch the whole video, and be sure to listen
@@Recommendedforyouall yes, he does say you can do it but you take the chance of putting bubbles back in your resin. Most videos I've seen of people who use the vacuum method use the longer working time resins.
The way it's done in the video is very skewed towards the pressure pot that beginners that didn't know any better would swear you couldn't use a vacuum system.
You just went Bill Nye on me (thumbs up) ! Great explanations.
Super awesome and informative video mate! Im starting myself on moldmaking for some figures and i was thinking on buying a pressure pot but i didn't knew much about the differences of the machines.
Hopefully this helped in some small way to make your purchasing a bit more clear :) Glad you liked it!
Thanks for the demonstration. I did a search, specifically to find an explanation of this, and got exactly what I needed to know.
From other processes, like kilning clay pots, and allowing moisture to escape, it occurs to me, that the vacuum, would need to be applied very gradually, to give the bubbles time to move to the surface, _through_ the resin, rather than bring loads of resin out with them.
Maybe, like cooking clay, you would need a timer, that could follow a programmed schedule.
Watching bubbles escape, is not far removed from watching paint dry!😉
I also wondered what the difference would be regarding light transmission, if you were making lenses, say for old lamps or similar. I suspect even bubbles that you cannot see, would affect light transmission.
This is the kind of video I needed. Thank you.
Of course! Glad it was what you were looking for :)
You are my kind of science geek!
I have no idea why I wasn't subscribed, I swear I hit the subscribe button last week, RUclips doing its thing, I might try one of your ideas at some point!
No harm no foul :) Give them a shot! I'd love to see what you create
This was awesome to watch. I now have more learn.
Thank you for that :) I appreciate hearing that others have learned from my videos.
This is a great video for tactile learners. Thank you!
Thank You
finally a clear answer to my big question. Great demo and explained very clear. sorry for the play on words there but supper job. Now I will build my pressure pot.
Haha that's good :) Glad I could be of help!
I'm not a dice goblin and even I know you don't vacuum pull a mold. Vacuum pulling the resin ahead of time, then pouring it into the mold is a lot more convenient in my opinion than leaving the dice in a pressure pot. The pressure pot needs to be turned on the entire time while the resin is curing, and depending on what method you're using to keeping the pressure pot pressurized, it can be pretty loud. A vacuum chamber needs to be active for a few minutes, until the resin doesn't look like it's foaming anymore, and then it's ready to pour and you can just leave it over night.
It's basically just the same process as a pressure pot, but instead of pouring first and putting in a pot second, you put it in a vacuum chamber first and then pour it.
Thank you! I used the vacuum and my materials got real hot and time constraint was an issue as you mentioned!. Great advice.!!
Still working on that cats eye thing, but I don't currently have access to a pressure pot or vacuum chamber, so I'm putting it off until I've secured the more necessary of the two at least. Thanks for the vid, it's certainly relevant to that process.
Of course! Happy to help :) Thanks for watching!
you just saved me ~$100 and a lot of frustration lol thanks
Thank you so much for this!
Of course! :)
Damn, Ryan. Straight flexin' that A&M engineering degree with that explanation ;D We see you and dat ring. You go boi!
Oh yeah, really putting all that money to good use, instead of getting like... and engineering job with it haha :)
Thanks bud! Miss y'all ;D
Can you do a video on vacuum degassing resin first then pouring it into the mold and into the pressure pot? Would love to see an up close side by side
Hey Rybonator, RawGage here. I’d love to see you create a set of Inception Dice! Take a mini set of dice and put them inside a regular sized set... and then put those dice inside a set of large dice! Make sure to dye from darkest to lightest with brightest to darkest numbers so you can see them and paint the numbers on each set before sinking them in. I think that’d be an amazing set. I’ll let you figure out the details of how to pull this off and you’re welcome for the idea ;]
This has actually been suggested quite a lot haha :) I do plan on tackling the dice within a dice idea, just have some others I plan on getting out first. But have no fear! It will come :)
I have heard a general rule of thumb is that vacuums are okay for silicone but pressure pots are what you need for resin. I've only just started so all I know is from the flood of YT videos I've been watching lately. Also I love that little D20 hat that comes out of the vacuum chamber. It could probably make a nice board marker or mold registration key.
Looks like it's gonna be a pressure pot for me! Thanks!
Thanks for that. Great info. Now I'm looking for the video to convert the HF pressure pot. It didn't show up in the corner like you said. I'll find it. Thanks again.
Thank you!
I'm looking into both but already have a pressure pump vs a vacuum pump!
Of course! I will be putting out a video soon comparing the use of the two on silicone as well :)
Please do the pressuring silicon video before December so I can know if I want are pressure pot or vacuum chamber for christmas!
I'll try to!
@@Rybonator Thanks man!
Great video, had to learn the hard way myself and fully agree on your judgement. Only that totally oversized pressure pot with it´s knucklebreaking screws is whar I do not like and find hard and unpleasent to work with. Get some dentist pressure pot, much smaller, nice and way more efficient. Very easy to work with takes less than one second to close/open. The right stuff for serial casting IMO
I honestly had never heard of a dental pressure pot :O I need to look into that.
Also thank you :)
In the vacuum chamber, just open the vent valve and let the bubbles shrink back down, then close the valve again. Rinse and repeat till there's no bubbles left. No mess to clean up later. Hope that helped a bit.
You absolutely can do that, but then you have to watch it more, it's more labour intensive than just leaving it sit after you start like a pressure pot, and most importantly, you gotta watch your time, as the resin can cure on you if it doesn't have a long working time. This method takes a bit more time, so that can become a real issue. Just something to be aware of :)
@@Rybonator gotcha. That makes sense.
Neat! Never would have thought to wonder about the differences since I don't make anything with resin but it was so cool to see the side by side results.
The full d20 was so pretty and clear, but like... the partial one looked epic. I need some desk sculptures of partial dice sitting in puddles of resin like they melted, or even a partial d20 without puddle to game with (not to roll of course but to like.. keep the other dice company / just add to the collection) Some of my favorite dice are weird, with paint where it shouldn't be or not where it should be, or an old d20 that appears to be from the first d&d, so old and beat up and chipped that it's not for rolling fair anymore. Uniqueness is beautiful to me and while I have wanted to make dice since starting watching your channel, this video really inspires me to make failed dice one day.
Well I have tons of oddly shaped or uneven dice from my escapades in dice making, so there are some really "unique" dice that you would probably enjoy :)
Because of your videos I've decided to make my brother dnd dice for xmas. If only everything would arrive together >
That's so awesome! He will love it I'm sure :) Can't wait to see what you create!
God every time I ask a question I find you've answered it already in another video 😂
Very informative. That's exactly the info I was looking for. Pressure pot it is.
Im new to resin and i got a heated lunch box because i seen people talk about using those for heat boxes and the vid i watched said to leave it in there the whole time of curing and it ended up turning it yellow...i could really use some pointers on how to properly use a heat box because the bubbles are gonna be the death of me haha. i also have an air chamber and what happened in the video is exactly what happened with me, so imma be returning it and looking into a pressure pot now for sure!
Thanks for sharing. this was super helpful!
This is a problem I see with people using vacuum all the time and something I had to fix in myself early on in my chemistry career. Pulling a full vacuum on any liquid from the get go will result in these same issues. Ask anyone who has had to clean out a rotovap because they were impatient and 'overfilled' the flask. For applications such as this, it is best to increase the vacuum in steps. You start with just enough to start removing entrapped air. If things 'boil' too vigorously then lower amount of vacuum being pulled. As you remove more air, you can increase the pull until you finally reach a full vacuum and you shouldn't have any issues with resin/silicone/etc. erupting from your container. This is, of course, a lot more babysitting than with a pressure pot but you should be able to get the exact same results without any loss of material. This also requires a decent regulator as well or a careful hand with the bleed valve.
Just wanted to share a bit on how to avoid what you showed for people who feel more comfortable using a vacuum chamber over a pressure chamber. I guess you could also set up a multi-stage vacuum system as well where you start with some cheap 12V pump that doesn't have much pull before moving to something bigger. I may need to do some testing.
Thank you for the info :) I was unsure of if that would even be worth it, or if it would take too long and the resin would start curing. I guess it's all a balance :)
It really is a balancing act and for a longer setting resin, it might be worth it, but for most people I believe the pressure pot is by far the easier setup. I may play around with the two resins I have on hand to see how they do as I have a couple of vacuum pumps. Now I just need to get a vacuum chamber to test things out in.
Well explained! Am I wrong in the following assumption? gold standard for perfect castings: Using both methods. Vacuum chamber that pulls at least 8CFM of mixed casting material thus reducing bubbles introduced in mixing. Pour casting material into mold (introducing poured bubbles). Place into pressure pot to reduce poured bubble diameter.
I assume you don't prefer this method because of extra step and need for oversized vacuum vessel to hold casting material?
Oooh, that SteadyCraftin’ reference! I’m subscribed now!
Great vid, too. Thanks 👍🏻
Thank you for another great video, you’re really helping me along my side journey
A way to get around the foaming issue while pulling a vacuum is to not pull a full vacuum at the start. Use your closing valve to allow air into the chamber at a controlled rate slowly working up to fully closed. This gives the sticky bubbles time to pop without causing an overflow. It takes some time and you basically are babysitting your pot until it's at full vacuum but it's a great way to reduce spillage.
Absolutely! It's more time/labor intensive, and you have to worry about your resins cure time, but it would work :) Thanks for the tip!
I wonder how these skills would translate to casting custom buttons, like for a modded gamecube controller? I got hit with a custom controller obsession and these vids were the first thing I thought of trying to research
You could probably make some very awesome customs with this technique :)
This is an awesome video, answered all my questions about what to use. Thank you very much!
I think have both setups is the best.
That's what I currently do. Vacuum for silicone, pressure for resin :)
The vacuum does not suck the bubbles out. Pressure (and yes vacuum is a pressure, just reduced pressure) is equal in all directions so what really happens is that the vacuum reduced the pressure around the trapped gases (air) in the resin thus the gas expands forming larger bubbles. These bubbles are now large enough and buoyant enough to overcome the resistance of the resin and float to the surface. Think about a scuba diver breathing out or opening a can of soda....the bubbles float the surface. Once at the surface you can release the vacuum which will compress the gas inside the bubbles again which tends to burst the bubbles. To stop the overflow, just release the vacuum before the bubbles overflow the container, maybe repeating the process several times......and yes, do it while in your mixing cup before you pour into the mold.
This is exactly what i needed to see! Thank you!
So, the pressure pot is better. Right? Because it takes out bubbles and DOESNT shrink.
Also, could you do some videos about making map props? I realy liked this vidio, thanks for difining the differences!
I plan on going over how I make my maps in my campaign soon, so stay tuned!
In general yes :)
The silicone video would be interesting. I'm not sure how true this is, but I read that you don't necessarily want to pressurize silicone because that causes shrinkage and makes it denser and less flexible/resilient. I have pretty great results with vaccuum degassing my silicone, but I always do about 100g of silicone per 4 cup container so that it has plenty of space to bubble up.
Also: I don't think you're incorrect saying "One of the dice" rather than "One of the die." Imagine similar sentences referring to one unit among a group: You probably wouldn't say, "One of the reason I use pressure for resin is ____ ," you'd probably say, "One of the reasons I use pressure for resin is ___ ," etc. Or you might say, "One of the channels I'm subscribed to is Rybonator," not "One of the channel I'm subscribed to is Rybonator." In fact Grammarly is losing its mind trying to correct my sentences when I use the singular form, lol
I still degass my silicone with no issues, but I think the key to pressurizing the silicone would be to use a much smaller amount of pressure. Maybe somewhere around 20-25PSI instead of the 30-40 I use for resin casting. :)
My favorite sentence happens to be when people say "One of the channels I'm subscribed to is Rybonator", so that was a great example haha ;D That makes sense though. I have just always been a little troubled in the whole English language thing.
Also curing under pressure suppress the boiling of the water in the resin reducing bubbles. We use vac and pressure at my work in a metallurgical laboratory to fill samples
That's so interesting, I hadn't even thought of that :O Thanks for the information!
Very informative and easy to understand. I’m a little unsure of what you mean by “adapted” your pressure pot. How did you adapt your pressure pot? Is the pressure pot model you use safe to use for those that are starting out or for experienced maker? Are there different models? Thank you!
I really like this informative video, plz continue! :D
Thank you :) I appreciate that. Will do!
Honestly the half die is cool though, not for rolling of course, but I bet you could fill a bunch of different sized molds to various heights, attach them to a map as like stalagmites and rock structures, and make a crystal dice cave for like a really meta one shot.
Verity_Reigns ooh awesome :D
"The Crystal Cave of the Dice Goblins" I like it! :D
Make giant dice with smaller dice in it
Like a foot tall
Oh gosh, like a GIANT dice :P
With how many small enemies my DM likes to throw at the party during encounters, this is totally necessary.
*pulls out giant die* Okay so this baby has 12 d20s in it. There's 12 enemies(minions), so large die determines initiative, small dice determine attacks.
Could totally be used for sneak attack too. Just get a large damage die with as many d6s in it as you need
Could you try either 1. slowly stepping down from atmospheric to the full vaccum or 2. Just crack the vacuum valve open so that it will gradually reduce the vacuum? It might also work to only apply just enough vacuum to start pulling the air from the resin but don't apply too much vacuum that it starts spilling everywhere.
Supposedly yes, if you are willing to pull, then release, then pull etc. it can work. It's just a more time/labor intensive method, and you have a limited amount of time to work with resin before it cures, so be careful! :)
Very helpful video - thank you.
Of course! Glad it helped :)
This is incredibly helpful thank you
Thanks a lot men, this exactly what i need to know.😁
Thanks a lot👌 it was hopeful
Next time try comolete mold pls
What I'm curious about is the air pressure encapsulated within the resin. There's 30 PSI worth of pressure in each bubble. Does that make your object more likely to crack? Are there any really old castings that can be examined for fractures?
I don't THINK that it's enough to matter in this case, as it may be 30PSI, but the area of each bubble is sooo tiny it shouldn't matter. I have some dice from a year ago with no signs of fractures so far :)
This was super helpful, thanks! 🙂
Helped A LOT. Thank you!