Making a Plaster Mold for Ceramics
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- Опубликовано: 20 янв 2018
- This is the 2nd video in the "Playing with Plaster" series. In this video I demonstrate how to prepare containers for pouring plaster to make molds for cups and bowls. If you enjoyed this video, please hit "Like" and subscribe to my channel. Thanks for watching, Capt Mike
That was very helpful. I enjoy the simplicity of the demonstrations.
This video is so helpful! Thank you for making this Capt Mike!
little tip from a bricklayer, when disposing of plaster its best if you throw it outside and then spray it down while its still wet, most can just sort of be absorbed by the earth and it wont do too much harm to your yard/grass as long as you dont do it too much in the same spot
I agree and I throw it onto my dirt driveway in front of my shop. It makes great fill for the holes and muddy spots!
Great little tutorial not overly complicated.
I love this video! It is so informative and uplifting
The best video I found on mold making. So simple and easy. Thanks so much. I am off to get busy !!
Good luck and thanks for watching my video!
Thanks for the tips captain and nice to meet you.
Very helpful video! Can’t wait to try!!
Thank you, Captain Mike!
Thanks for the good tips. Also, the few things that you forgot to do really emphasized the importance of not forgetting those
steps. Very helpful.
Thanks so very much for this video Capt. Mike!!! I was finally able to make a mold by following your video!!! Thanks so much again!!!
Thanks for the comment. If I can be of further help, please ask.
Loved this video!
And I love how he shows how to remedy problems
We use a whole different procces and this is WAY MORE efficient, easy and fast. Loved this vodeo. Thanks for sharing your knowledge.❤
Thanks for watching my video and thanks for the comment!
Love your videos! You explain the process so well. Thank you!
Thanks!
Follow his directions and you'll clog your toilet!!!
I love this video! Thank you for the easiest way to explain it!
Thank YOU for watching!
Golly that was a great video! I really enjoyed it, looking forward to checking out your other videos. Thank you Mike!
So great! I was looking exactly for a video like this. Will try ASAP! Thanks Mike, you're awesome!
Thank YOU for watching!
Thank you for taking the time to share your knowledge and experience in this Video; It was exactly what I was looking for in instruction - a simple introductory video to get me started as simply as possible -- & I loved it! I learned what I wanted to know in the first couple of minutes; clear, concise, and knowledgeable; Well done! PS: How anyone could give this a thumbs down is beyond me!
Thank YOU for watching!
Believe me. There are so many other videos out there rar better!!!
You make the best little tutorials!
Thanks!
Thank you! This was great!
Thanks for watching!
right on! i like your approach
Thanks for watching my video!
Great tips. Thank you
Thanks for watching!
Fantastic
That was so interesting and helpful. Your voice is so pleasant and cute. I am new to this and I’m really glad you did this, now I’m gonna watch the other videos you have to get all I can thanks from California
His voice reminds me of Bob Ross.
I want a women Say this to me each morning
thank you very helpful
Plaster expands when heating up.
But a real mold maker would know that. This is some funny stuff.
Seriously.
Very helpfull, thank you! I would like to see how you hit it to take the mold out.
Thank you, good sir!
Thanks for watching my videos!
Thank you.
Very helpful :) ty for the video
Thank YOU for watching!
Success! 😊
Great!
I’m from Denmark 🇩🇰 and hope i can make myself understandable Hope Thank you !! This is a fantastic video… i like that you take time to show and explain in detail. I have a brain injury after surgery,for brain tumour and strokes, and therefore I need a full explanaton and video to understand… I’m not stupid nobody with a brain injury is, but because , my tumour was placed in my frontal lobe, My handicap is centred around this problem.
I recently and successfully made a mole. I used a glass. I could get it out. Someone advised me therefore t use a saw, and saw it in 3 peace’s… no success… it cracked… How did u bump your mould on the floor? To get it out. Did u do it sideways
Greetings from me in Denmark 🇩🇰 😊
Thanks for watching. The bumping must be gentel, it's just to dislodge a slighty stuck master. It is necessary to use a good release agent or no amount of bumping will separate the mold from the master.
Thanks for answering me 😁
Thank you!
Thanks you for watching!
I really like your videos, thank you for sharing, even the boo boos. Cheers from Australia!
This video saved my day as I decided to make moulds in plastic measuring cups 😅 but as soon as I released them I realised my ceramic 'master' cups got stuck in plaster 🤦🏻♀️ should've used a releasing agent! Anyone managed to get a ceramic cup out before? I eventried breaking one of those but they are stoneware 😅😅😅 tough luck!
I think it is might near impossable to remove a ceramic objst from plaster, but Let me know if you foind out how to do it. And thanks for watching my video!
Great video. Would you have a video on how to make a mold for a tea cup and saucer?
Bob Ross vibes ❤️
Lindsey, your too nice! Thanks for watching.
*930-cu bəyənmə 👍👍👍 məndən.* Thank you so much, this is what I exactly needed. 14.04.2022, 1:18 a.m
Thank you for watching my video!
Great explanation! Thanks for sharing. Question: would plaster be usable as a bowl, or would it come apart after getting wet?
It would not come apart, but it would soak up any liquid placed in it. It is not advisable to use plaster for eating. Not poisonous, but difficult, if not impossible to clean.
Thank you very much for sharing. Planning to make a few on the weekend, however, I have a question before I start. When the finished Slip Poured Piece is finished the next day, at the time of removing it from the plaster mould ... will there be bets of plater on the clay? If so, how is it removed? Thank you in anticipation for our time :)
If your mold is made and has cured properly you should have no plaster residue on the cast piece. If you do just remove the plaster bit carefully from the molded clay, smooth and let dry.
Excellent video! Thanks!! Can you make a plaster mold from a plaster figure??
I'm sure you can, but it would depend on how well you sealed the plaster and what kind of release agent you used. if the figure is not replaceable I would be careful.
Thank you!@@CaptMike
For a plastic mold i use boiling water to un mold the project et its work very well.
thanks for the tip!
Great video! Do you have a video on how to pour slip into the molds?
Start here ruclips.net/video/7AWJ9fexYOc/видео.html but there are lots of videos on pouring slip into molds. Try a RUclips search using "Slip Casting".
Hi I enjoy your videos. Can you do a video to show you making the bowls and what types of clay you use. Thanks
Hi Maria, yes, I plan to make a video casting a few things in the plaster molds. I will be sure to include a couple of bowls.
Hi again Maria, I uploaded a video about basic slip casting. I hope you find it to you liking. Thanks for commenting.
this video has been really helpful thankyou ! just have 1 question on how long did wait before demoulding the items you cast, out ? i’ve messed up a few times from demoulding to early and plaster pulling out and ruining the detail
Georgie, this is a tough one. So many thing to take into consideration, such as new slip vs slip that has been sitting around awhile. Or slip that has had water added instead of a deflocculent. It is also important the the mold is not waterlogged through multiple casting. The last thing I can think of the really effects setting is temps and humidity. If you have not been casting long it will come with experience. I probable give the clay more time to set than is necessary. For starters, just leave the casting in one side of the mold if you can and test it every 30 minutes or so to see how solid it is. Hope this helps.
Capt Mike oh im so sorry i’ve not worded my question correctly, i meant it as in, when you have poured the plaster how long do you wait to take out the silicone butterfly you had in it, i’ve messed up plaster by taking things out too early. sorry for the confusion
@@georgiepalmer7000 The plaster heats up a little as it sets. I usually wait ovenite to remove the master from the plaster mold, but have successfully removed the master after a couple of hours.
Thankyou for this. I have a doubt..what if we handbuild ..either at the bisque stage or after glazefired stage , Can we use the ceramic piece to make a mould?
Yes, but you will have to experiment with a release agent to make sure the plaster does not stick to the bisque or glaze.
@@CaptMike 👍
Hi Captain did i have to heat my plaster mold before using whit slip.Thank you
No, but the plaster needs to be dry before you pour in the slip.
The vegetable spray doesn't effect the water from being absorbed into the plaster mold after pouring the slip does it?
This other video I watched said don't use it when slip casting.
Chris, I have had no problems with the vegetable oil causing absolution problems, but I do use it sparingly. In a lot of cases, if yu are using clean plastic, you can get away with no lubricant. Glass is sometime problematic. Does the other videos suggest an alternative method?
@@chriswinterstar4829I use the soap method (Murphy's Oil Soap) when I am using wood for the outside of the mold or for the master if it is wood. Try a test mold of something small like a plastic cup and use cooking spray as a release agent. See if it give you any problems. If you have time you might try it both ways and compare.
hi!! i found this video really helpful, but i do have one question... could i make a mold out of a ceramic object that has been fired and glazed? or will it stick to the plaster? please reply! thank you.
It's tricky, but can be done. First make sure there anre no undercuts on the original that will impeded removal. Second, make sure to use a mold release on the original. sometimes cooking oil or wax will work. I would apply the mold release and then put some plaster on the object; just a small amount and see if it will remove easily. Lastly, don't try this with something that is irreplacable. I would hate to see you ruin it.
Capt Mike thank you so much! and i really appreciate your quick reply, i hope you have a really good day!
Can you use these moulds for fusing glass ?
No, plaster will not hold up to the heat required to melt glass. Thanks for watching and the comment.
Is there a downside to just not cover everything with oil before putting plaster in? It seems like it would make it come out more easily when the plaster is dry. Could too much oil mess things up?
Actually, too much oil will cause the mold to have a rougher texture. I have experienced this a couple of times. It seems that the excess oil wants to migrate to the bottom of the master, so make sure you get that off. Thanks for the comment. It was a good one.
Hi captain i find a way to unmold in a plastic mold i use a boiling water that i spread on a mold and it release easely.
Sounds like a good idea. I'll have to give it a try!
how are you making the inside mold to match the outside one? good video by the way.
Not sure I understand the question. If I make a simple bowl mold I only have the outside. I pour it full of slip and then after it sets up a little I pour out the excess slip. What's left is a shell that will be the bowl.
@@CaptMike aahhh yes, i understand now, you need no inner mold. thanks, capt. i do hand-built stuff and never tried slip casting, it really is very simple
What kind of plaster are you using? We're you able to make slump molds for your glass projects that work in your microwave kiln?
I use commercial plaster because it is very cheap, about $9 for 50 pounds. Plaster by itself will not work as a slump mold.
@@CaptMike I would not need ceramic plaster for the slip pour mold? Thanks we can try your idea for plaster, would it help to make a slab for rams head or spiral kneading or to absorb liquid out of the clay.
@@samanthanicholson9015 Any kind of plaster will work for making a slip casting mold. You can also use plaster to make what is known as a sprig mold. That is a mold the is flat with shallow molding parts in it. Think leaves, bird siluets and such. The job of the plaster is to absorb the moisture in the clay.
Do you use plaster that can be bought at Lowe’s or do you use pottery plaster?
I use standard industrial plaster.
not sure if you will see this, but i have a stocking in bisque that i would like a mold of, how do i do that?
I would have to see the item to make a good suggestion, but to start you will need to make a two part plaster mold. You will have to enclose the top if it is open and you will need a good mold release agent. I would suggest you start with a bisque piece that is replaceable and see if you can get the plaster to release on that.
Do you have a method for making molds for glass?
Yes, and I am working on a video for that now. To fuse glass, you have to use a ceramic mold. I first make a plaster mold and then from that a ceramic mold. Not as easy as it sounds, but hopefully I will get through with the video in a week or so.
Are you using plaster of paris, or is it something specialized?
I use regular industrial plaster. Buy it locally in 80 pound bags. Nothing special.
You are actually supposed to use #1 casting plaster it's difference in plaster of Paris I believe it has silica in it and absorbs a lot more water. Plaster of Paris will work but it's a lot more prone to defects and cracking and will not absorb as much of the water
@@ClownWhisper Thanks for the reply and i'm sure your are right, but I get 80 pounds of industrial plaster to $9.00 US and it works just fine for my projects. I just let the molds dry out sufficiently before casting again.
I'm also in Georgia so I can understand exactly what you mean! My question is do you have a video showing how to make a 2 piece mold using styrofoam? Thank you
Beth, do you mean by using solid Styrofoam or the kind that come in a can and expands? I have never tried either for a mold. What are you going to cast in the mold?
I have Styrofoam heads that I'd to make molds of. They are solid. I was wondering if coating it with petroleum jelly would work.
What will you be casting in the molds?
I've been making hypertufa for years and love making "pot" heads. Now that I've inherited my MIL's ceramic molds and kiln I want to make ceramic pot heads. Just have to figure out how to make a 2 part mold.
It should be no problem to make a two part plaster mold of the heads. Are these heads like the ones used to display hats and such? If so it will be a nice sized mold, but nothing that difficult. If I can get my hands on a head (I used to have one) I will try to do a video. I know there are plenty of vids on RUclips that show how to make a two part plaster mold.
Hi can make crucible for melting silver or gold
Not from plaster. I don't see why high fire ceramic clay would not work, but I have not tried it. Most use one made from graphite. I think it has to do with the possibility of the crucible breaking and spilling the contents.
@@CaptMike think you can send me side how can do this crucible
@@hossamslime9354 watch this video and see if it helps. ruclips.net/video/s6ZmDY5Vma8/видео.html
i couldnt find a link or keywords as such soluble casting plaster can u do me a favour thx :)
Any plaster will work. Casting plaster is more expensive and may have properties that the industrial plaster I have does not have. Go to a big box store and see what they have available.
Can these molds be used for glass
No, they will not hold up to the heat.
Thank you for your response and knowledge. Appreciate it
I want to make a mold to make a tea tray in jemonite, but dont know how.
A mold made for this product would most likely have to be made from latex or silicon. I would think that the casting material would stick to a plaster mold. I'll have to order some Jemonite and do a few experiments. If anyone has used this material in the past, please jump in!
@@CaptMike yes. I just dont know how to go about it. I have a lovely italian teatray with moulding around the sides, I really want to copy it. I have some made of wood pulp but thats impossible to do as they are machine pressed.
@@CaptMike I called the place where jesmonite is sold, its in Surrey I think, and they said it would be good for trays.
@@deborahgonzalezknight168 I'll see what I can do about making a video on making plates and trays from slabs.
Wouldn't you make a mold for this out of concrete?
This plaster can use investment casting lost wax casting
Thanks for commenting.
@@CaptMike answer plese
@@Bokan. I'm sorry, please be more specific with the question and I will try to respond.
Ring 💍 casting investment Powder this
Can cast ring
Bang it on a floor.
Break it out of the mold...this has to be a parody. I can't believe this guy.
Do you have some sort of a disorder? You know, one where you don't really understand what you see or hear.
Please, no one flush plaster down your toilet either! Just let it harden on a bunch of newspaper or something and discard in the trash. And try to make no more than you need so there isn't a lot of waste.
Listen to the lady!
NEVER EVER POUR PLASTER MIXTURE DOWN YOUR TOILET DRAIN!
This is one of the worst videos I've EVER seen.
Vaseline is not something you want to use when making a ceramic mold. It's petrol chemical AKA Grease! Use mold soap. You can make your own.
50/50 water and Murphys Oil Soap.
He sounds like he's making this stuff up as he's going along.
Well, sounds like your the expert, so there!
Very helpful video! Can’t wait to try!!
Thanks for watching!