Plaster Inductions
Release agents – Soft Soap – will come off easily
– Vaseline – will stay on mould and will be difficult to remove for reusing the mould.
You can not remove the original piece like you do with silicon moulds. The silicon flexes to allow the object out, plaster does not.
This means the mould will have to be in many sections, depending on the object.
When using plaster, you should try and avoid making hollow objects or doughnut shapes. A tyre would be hard to make as the plaster would set, shrinking in on the mould.
When making the mould you need a base board and walls. These can be board, laminated chipboard, fairly cheap to obtain.
Mask Making
Possible materials
Clay – cheap and you can make it into any shape you want. However it tends to dry up, so it needs to be kept moist to be worked into shape. Also it may crack once hardened, and if it is a thin surface then it could sage or break.
Plastacine & Plastaline – plastaline is a finer version of plastacine, is better in some ways but it is almost unworkable when cold. It is not as cheap as clay.
Chavant – is oil based non drying, unlike clay.. It also needs warming up or it can be cut into chinks, put in a tin foil lined box and heated with a spot lamp.
Super Sculpy – won’t dry out – won’t go hard, therefore it needs baking in the oven to hold its shape.
Art Mache – is very strong and gives good detail. It does take along time to dry, but this time can be used to add items or texture to the object you are making.
Clay Mask
A mould would need to be made first, alginate could be used to do this, then making a plaster mould from it. Once you have a mould clay needs to be applied to the mould in small amounts. This allows you to build up the mask in sections, giving you control of the thickness of the clay and the detail you want.
Use a spray bottle to keep the clay moist if you are working on the mask for a period of time.
Release agents – Soft Soap – will come off easily
– Vaseline – will stay on mould and will be difficult to remove for reusing the mould.
You can not remove the original piece like you do with silicon moulds. The silicon flexes to allow the object out, plaster does not.
This means the mould will have to be in many sections, depending on the object.
When using plaster, you should try and avoid making hollow objects or doughnut shapes. A tyre would be hard to make as the plaster would set, shrinking in on the mould.
When making the mould you need a base board and walls. These can be board, laminated chipboard, fairly cheap to obtain.
Mask Making
Possible materials
Clay – cheap and you can make it into any shape you want. However it tends to dry up, so it needs to be kept moist to be worked into shape. Also it may crack once hardened, and if it is a thin surface then it could sage or break.
Plastacine & Plastaline – plastaline is a finer version of plastacine, is better in some ways but it is almost unworkable when cold. It is not as cheap as clay.
Chavant – is oil based non drying, unlike clay.. It also needs warming up or it can be cut into chinks, put in a tin foil lined box and heated with a spot lamp.
Super Sculpy – won’t dry out – won’t go hard, therefore it needs baking in the oven to hold its shape.
Art Mache – is very strong and gives good detail. It does take along time to dry, but this time can be used to add items or texture to the object you are making.
Clay Mask
A mould would need to be made first, alginate could be used to do this, then making a plaster mould from it. Once you have a mould clay needs to be applied to the mould in small amounts. This allows you to build up the mask in sections, giving you control of the thickness of the clay and the detail you want.
Use a spray bottle to keep the clay moist if you are working on the mask for a period of time.
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