Pottery Top Tip: How to make plaster moulds for your pottery projects (Pottery Video/Tutorial)
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- čas přidán 21. 08. 2024
- In this video I show you how to make your own plaster hump, slump and casting moulds using Potter’s plaster (mine is Keramicast) which can be obtained very cheaply from your clay supplier. My bag of 25kg was approximately £28 and I have made 6 large moulds from half the sack (so more fun to be had making more with the remainder!). I hope this is a practical “how to” guide that will save you money. Hump and slump moulds are particularly useful if you want to make multiple items all the same (such as a set of mugs or cereal/pasta bowls). These can then be used over and over again by slab building.
Hi I’m Sarah Amos. I gave up my day job and am now living the dream as a full-time potter and teacher, running courses from my studio, The Pottery Corner, in a little village just outside Chichester on the South Coast of England. With Cissy and Charlie, my studio companions, we welcome students of all abilities from complete beginners to the more experienced, teaching throwing on the potters wheel as well as handbuilding techniques.
I love to share my clay experience and knowledge by passing on pottery techniques in my Top Tip Tuesday videos; which include full tutorials on items to try out yourselves. I also sell my work via my Website and Etsy Shop. So grab a cuppa, sit back, relax and let’s dive into what’s going on in The Pottery Corner today.
Don’t forget to subscribe and ring the bell to be notified of when new content is published. Thanks for watching.
My Etsy Shop: www.etsy.com/u...
My Website: www.thepotterycorner.co.uk
You are such a good teacher. And the content you choose to share your knowledge about is very helpful! 🌸
Thanks for your kind words. Much appreciated
Thank you again Sarah - you are so generous with your knowledge.
Another great video, thanks. When you’re using a big bowl for a mould, you can tape a big plastic ball into the plaster to give you a slump mould on the inside. It also reduces the weight of the mould. Keryn in Sydney.
Thanks Keryn - that's a great tip! They are pretty heavy to move about. The casting mould can be used both ways around - casting or slump on the inside and hump on the outside. Thanks for watching.
I love your videos! Thank you for your generosity!
Hey Carrol and thanks so much for watching. Great to have you along 😀
I am going to try it. Thanks for your video.
Great! Thanks for watching Pat. 😁
Hello Sarah, thank you for your wonderfully clear and empathetic demonstrations.
Please could you show how you drape the clay over the plaster moulds which you made in this video, I'm thinking particularly a mono-printed slab of clay,
and also how you use the slip mould.
Very many thanks. We beginners are so fortunate to be able to access your generously given knowledge.
Thanks Polly - this is on the list to do! I thought it would be a good idea to show how to use the moulds - thanks for watching 😀
Only just discovered your channel and loving the demos. You explain things really well without too much chit chat. Very professional. Thank you! Wish I could visit your studio but live DownUnder!
Hi Julia and thanks for watching from DownUnder - great to have you along. Thanks for your kind words- much appreciated 🙏
I am very new here and was thrilled to find you last week. I am now going through your vids. What a fabulous teacher you are, you make it very easy to follow. Thank you! I used to spend many an hour in the Clayman shop, near Chichester, before moving to Ireland! You will know it I am sure.
Hiya and welcome along 😊. Yes - clayman is my local clay supplier- Reg is still as grumpy as ever 😁. Thank you for your kind words
Great video I was thinking about making my own moulds for serving trays. I can't wait to see your slip casting video. I look forward to that one.
Thanks for watching. Certainly great to make your own unique moulds. 😄
You are just a super teacher and want to thank you for taking your precious time and letting us benefit from your knowledge. Love and thanks from Turkey, Bodrum🌹🙏👍🤗
Thank you so much for your kind words Inci. Much appreciated. I have been to Bodrum some years ago - beautiful place. Bet it's not raining where you are 😄
Once again nearly midnight and im still watching your channel..perhaps i need to put a telly in my studio and at least attempt to be productive 🤣
🤣🤣
Excellent video, really enjoyed seeing the whole process thank you
Thanks Emma - glad you're still watching the channel and hopefully learning more. XX
@@thepotterycorner your videos are excellent so defo still watching and learning ♥️
Very useful video -as always- and nicely explained by a beautiful Princess Leia, from earth...and about earth...
Thanks very much for your kind words! Glad you found it useful 😀- loving the Princess Leia comment 🤣
Thanks!
So many creative ideas for creating plaster molds!
Thanks for watching Terry- a messy business but you have the moulds forever so worth the effort. 😁
You are the best!!
Thanks for watching Cathy. 😊
Oh, thank you! 👍
Thanks for watching Juli. Great to have you along 😀
Yet an other useful video from you. Fantastic explanation. Thank you so much.
Thanks for watching the back catalogue. So pleased you're finding them useful 👍 😀
Enjoyed the video, however I will not be getting in to making molds. I use plaster to make a wet box and gave the excess to a studio as I knew I would probably find the dry plaster and dust sneaking in to other areas of my wee studio.
Good pointers and well presented Sarah another helpful video.
Thanks Freddie - you're right - it really is a completely messy business. I try to only make moulds all together to avoid using plaster too much but for my students moulds are really useful for making sets etc. Thanks for taking the time to watch and comment. Much appreciated as ever. 😀
I’ve watched this many times. Thank you so much.
Thanks Michele. I'm glad you've found it helpful 😊
Thank you so much for sharing. After seeing your video I'm going to try to make my own moulds, as everywhere is out of stock of cereal bowl moulds... wish me luck. You always make everything look so easy but I'm sure mine won't come out as well! but will give it a go! lol I've just checked and Bath Potter's has some Keramicast in stock so will order some. 😊
Hi Debi - I made some more yesterday- double moulds for casting and hump moulds. If you use a slightly flexible plastic container - Tesco have some cheap mixing bowls/measuring jugs(about £1.50-2.00) which have a lovely shape for a pasta dishes/cereal bowls. Just remember the shrinkage amount when choosing the container. Have fun! Thanks for watching 😀
@@thepotterycorner Thanks, yes will do. I think I have some of Tesco mixing bowls/jig in the studio they are a great price! I think I will get some more though so I don't contaminate between the plaster and clay.
Great tips thank you
Thanks Lynette - kind of you to comment. 😀
Great video thank you I need to make a mold of a mug hoping I can do that !
Hi Mystie - Quite easy but messy! Have fun making your own. 😀
Where you able to make a mold of a mug? That is what I am trying to do. It's definitely more difficult than it looks.
just love your videos..I have been so busy with work..12 days on 2 off..work in Healthcare.. bloody covid mandates..so short staffed..pottery hS taken a back seat..I did make two wonky pots! love NZ ❤️
Hey again Amanda. Life does get crazy sometimes. Covid definitely hasn't helped. We're just on the start of a new wave here too. Send me photos of your wonky pots via the website! Be great to see then. Keep your chin up- you're doing a great job 👍 👏
This is great, thanks! You’re funny
Thanks so much for watching 😊
Thank you for your help and explanation!
Thanks for watching Evangelie - glad you found it helpful 😀
@@thepotterycorner 🥰
Loved this video--- inspiring me to make plaster molds from the bowls I have in the shack---currently using as slump..but always having to use plastic wrap to slump them... I don't want to seem "dense"...but when using the plaster slumps---are you able to lay clay right on the mold? or does the plaster still need a barrier between it and the wet clay?
Hi Kd - thanks for commenting again. Once the mould is made, you don't need to use a barrier between the mould and the clay. Just make sure you use wooden tools when working against the mould. The mould is porous so it will take the moisture out of a formed skab fairly quickly (say 20-30 minutes) so don't leave it slumped for too long. Great way to make multiples. 😁
Saludos desde Costa Rica
Great! Thanks for watching 😊
Great video! Keramic is not a strange word, pottery is called ceramic, or keramikk in many countries in Europe. It is a greek word translated burned things. 😊
Interesting! Thanks for watching 😀
Great stuff
Thanks for watching Barbara. 😄
Hi an other way to remove de plastic mold is trow a boiling water on the plastic mold and it will release the plaster piece fast.
Echoing many previous commenters; thank you for sharing your knowledge and experience with us. I’m sure there are many more hours of prep and editing that we don’t ever see and I appreciate it very much. I want to make a mold of the underside of a rhubarb leaf. If I supported the leaf with sand in a bowl-ish shape could plaster successfully mold to the leaf? Or will the leaf disintegrate in the heating and cooling process? I’d like to make bird baths and plant pots from the rhubarb mold.
Hi Annie and thanks for watching. There is a video on my channel of how to make a bird bath from a rhubarb leaf - this may help you! 😊
Nice video. Thank you. Can you tell me how you calculated your volume of plaster? I know the ratio of plaster to water but not sure an easy way to calculate how much plaster I’ll need for the mould. Thanks.
Hiya - I measured the water in the receptacle that I was going to use first (i.e. the bowl I was going to pour the plaster into) and then used that amount of water for the mould itself. Hope that helps. Thanks for watching.😀
@@thepotterycorner thank you. I was thinking along those lines but wasn’t sure about the mould with the clay mound and flower pot. IE taking that amount of space out of the calculation. But in the end there shouldn’t be a lot of waste. I find that the plaster and water together make up more volume than needed when I put the water in the vessel to measure. So many variables 😊😊❗️Watching your slip cast video. I think I’ll try experimenting with colored slip today!
.after moulding comes the "trimming" , what happened to that video?
Once the mold is finished and ready to use, how do you remove the plaster dust that would inevitably be left on the mold?
Hi - there isn't usually plaster dust on the mold but I always wipe the mold with a damp cloth before using it just in case! The most important bit is not to use metal tools. Hope that helps. Hope you have a go.
Good video, thank you. Here you say that plaster will make the clay explode ... so when using the mould for Slip, at the time of removing the clay pot from the plaster mould - must the clay pot be thoroughly cleaned before finishing its drying process or after it is bone dry?
Hi and thanks for watching - If the plaster mould is dry and would haven't used metal implements on it then there shouldn't be any need to clean the pot that comes out of the mould. it is only in the making of the mould and the use of metal implements that could cause plaster to get into the clay - which would definitely explode in the kiln! Hope that helps.
石膏の型のつくり方例えばコーヒーカツプの型を
知りたいです
Will watch this tomorrow morning on Tuesday, too late tonight @ 9:55pm.
Me again from New Zealand 🤗 would these be ok for glass forming?
Hi there- I'm not sure about that. Ic think the plaster would be too thick. Most glass moulds are thinner and you'd need loads of kiln wash. Not an expert on this I'm afraid 🙂
Now what do you do with it?
Thanks for watching. There is a video on my channel about how to do the slip casting if you search on my channel 😊
@@thepotterycorner After I asked, I found it. Thanks.
would you recommend silicon molds to make plaster molds in?
Thanks for watching Adel. You could use silicon moulds but you'd need to ensure that it would turn out and use spray oil as q releasing agent. Be interesting 🤔
👌👍⭐️⭐️⭐️⭐️⭐️💐🙋🏼♀️🇦🇹
Thanks for watching Claudia. Great to have you along 😀