This is where to come and gain the knowledge you need to keep on pouring and firing those masterpieces you are creating. Pouring ceramic Molds. TO pour your ceramic molds, first you must understand what the molds are and what they are made of.
Plaster is the most common material used to make the mold.
This material comes in many grades. The grades relate to the density or hardness of the plaster. The harder the plaster the longer the mold will last, but, the longer it will take for a pour to setup and be ready to be removed from the mold. After time the molds do lose some of thier ablity to absorb water as other chemicals clog up the pores in the mold. This is why that nice new mold can produce 4,5, even 6 greenware pieces in 24hrs, while an old mold may only make one.