to cover your master using water as a surrogate (thank you
Archimedes!) and buy only the amount of ComposiMold that
you will need. The 6 ounce jar is intended to allow you to try
ComposiMold and is enough to cast items using a paper cup as
a mold box, as we will see.
To make a mold, in addition to the ComposiMold you will need
a few Popsicle sticks, some toothpicks, suitable mold boxes,
mold release, and access to a microwave oven. The mold box
holds the master while you pour the mold-making material
around it.
Conventional silicone or urethane rubber processes can
use loose-fitting mold boxes made of wood with unsealed
joints because the rubber is too thick to leak out. Because
ComposiMold is a liquid, the mold box used with it must be
watertight. Paper cups are ideal for casting smaller detail
parts, and baking pans (regular or disposable) are better for
larger items. While
ComposiMold is non-
toxic and cleans up
readily with water, it's
probably a good idea to
buy some baking pans
from the dollar store
rather than use the
household bake ware
– you'll have fewer “dis-
cussions” that way.
Mold release can be any-
thing from petroleum
jelly, talcum powder
(although this leaves a
powder to deal with),
lotions, cooking spray,
1
1. ComposiMold comes in a
variety of sizes.
