How to Make a Plaster Mould
CHAPTER VII
HOW TO MAKE A PLASTER MOULD
In building pieces of pottery whose walls have a decided flare, a plaster mould will be found most useful. Its sides support the coils of clay and enable the potter to form his piece much more rapidly and surely than he could by eye, or even with the cardboard outline.
It should, however, be used with judgment, rather as an aid in beginning a piece which is afterward finished by eye than as a mould in which pieces are duplicated. Turning out many pieces exactly alike savours of commercialism and does not develop the potter’s individuality. Several bowl-shaped moulds, varied in form and flare, if used as suggested, will be a great assistance to the potter. They are made quite easily, as follows:
A Bowl-shaped Mould of Plaster
Materials required:
6 or 8 pounds of clay, well mixed,