A useful tool for the potter who makes slip casting molds. Lets you calculate the amount of clay, plaster and water needed to create a mold from your desired object.You will have a clear idea of the dimensions and costs of your molds with no more wastes of plaster, or half filled molds. This version is for two parts molds and includes a brief guide on how to make two parts molds.With plaster molds you will be able to replicate your pieces easily.