Mould Making
Plaster moulds used for the reproduction of items in resin, wax or latex are either open moulds for straightforward pouring or enclosed (piece) moulds comprising two or more interlocking pieces used for swilling or casting.
Flexible moulds, usually backed with plaster supporting-cradles and known as ‘case’ moulds are used for laying up glass-fibre objects or for casting complicated items where there are problems connected with undercuts or detail that could not be withdrawn from an inflexible plaster mould.
How to make a two-piece mould
Place the master to be moulded on a flat board and surround half of it with clay. Finish the edge of the clay cleanly and uniformly around the master to provide a firm support for the top half ...
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