School of Art Demonstration: Slip Casting Functional Forms 

just wondering the same. Did you get to know the name?

yes! you turn the dough two time round the table and use two grils one cup vid.. welcome mister!

TheDreadfulCurtain

I wish that I knew the name of this technique, but I have seen what she is talking about done with cement pots and plaster molding. pin.it/w72gm2ny6355vf pin.it/mt56e4ov7ljimc

If you’re really good at throwing and being a production Potter!!! Lolol..not everyone is able to master that I guess...

John Wijnberg you would either make one just like she did, then after your clay is leatherhard, you add the handle. This is what I would recomendable Or you can make a two piece mold with the mold split north to south down the center of the handle. But this requires much more work and you have to take the mold apart every time.

Syafiq Ahmad The most important factor is how porous the plaster is, but it is also affected by how wet the mould is (from previous casting and humidity). I use a ratio of 7/10 (water to plaster) when making plaster moulds. More water will increase porosity but reduce affect how long your mould lasts and how robust it is.

Raja Write how liquid clay that pours into the molds and materials used in it and its amounts.

Suneil Nevgi no you can not just pour slip into anything. The vessel/mold has to be porous to absorb the slip.

0vrStart The slip would probably be colored with ceramic stain or oxide (looks like stain to me). She’s likely done a bit of testing to get the right quantities for the desired colour.

MaZ No, not for slip casting, but you can use bisque moulds for slip and hump moulds (for rolled clay, not for slip)

Please Write how liquid clay that pours into the molds and amounts

Tina Perry once you pour your slip out, leave your mold upside down and wait a few minutes, the clay will continue to shrink and fall out of the mold

Yes, you can add small amounts of ceramic stain or oxide (take care using any powder in your studio). Your supplier can usually advise you.

compound of past .. wut?

did you watch the video?

14 minutes

It depends on the clay. Each kind of clay will shrink up to a different degree but most pottery shops will tell you very precisely how much shrinkage you can expect. If you need a plaster master to create a very precise size of cup (such as for measuring cups), you can determine it based on the specific clay's shrinkage using geometry

She is using a slip trailer (that bulb thing) to drizzle or “trail” slip of the same clay coloured with ceramic stain or oxide.

Hi Jolene. Julie says in the video that she used Shellac. I hope that helps. Best, Amy

What release agent was used?? She said the master was coated with shellac but then added that it was coated or "soaped" with a "mold making size"...Thanks

Step one ! Go on google and search for ceramics courses. Or try buy books about ceramics art. 1 - Make a master from plaster. 2 - Mix alcohol with shellac ad make liquid solution of it. 3 - Apply that solution on your dry model. In very thin layer. Shellac clogs pores of plaster. 4 - Mix your lubricant time ! - We use mixture of soap flakes with oil and you need to stir it in the heat with mixer - Mix of oil and soap makes great fluffy creamy lubricant. 5 - Apply it on your shellac covered master, with brush. That fluffy cream is amazing release agent. 6 - Make molds from plaster. 7 - Put these new babies in water it helps get your master "pop" from your casted form. 8 - Let it dry for few days, if you have kiln-drying box ,good for you, it makes this process faster. 9 - Cast your slip in new form. 10 - Profit ?????

That’s about right (2 in 24 hrs), but you can speed up the time to dry out your soggy mould by putting it in a fan forced oven (with elements shielded... you can use a baking tray under or over the element) at between 50 and 60C absolutely no more or your mould will become brittle, powdery and fret. Otherwise, make duplicates of the same mould.

Dale Glenny Thank you so much!

Yes.