The first step in creating a latex rubber Halloween mask is to sculpt a pattern in Oil-based clay. The clay is applied to a lifecast armature and roughed-out to establish the general shape. Gradually, as the clay is worked by hand, the sculpture begins to resemble your design idea. As the clay sculpture nears completion, fine sculpting tools are used to sculpt realistic details. The entire sculpting process can take several hours, or days, to complete. Once the Oil Based Clay sculpture is finished, it is ready to be molded.
STAGE TWO: MAKING THE MOLD
In order to transfer the clay form into latex rubber (RD-407), it is first necessary to make a two piece mold out of an industrial gypsum called Ultra Cal 30. The mold is a perfect three dimensional copy of the sculpture, except in reverse. Gypsum is used because of its porous nature which allows water from the liquid latex rubber to soak into it. To make the mold, a dividing wall is put in place to divide the front and back halves of the sculpture. Gypsum is applied evenly to both halves until a sufficient thickness is achieved. Once the mold is complete, the two halves are separated and the clay is cleaned from the mold. The mold is then placed back together, bound, and made ready for the next stage...