This document provides an overview of plaster of paris (POP) and clay manufacturing processes. It discusses that POP is made by heating gypsum and sets hard when mixed with water. Clay can be molded when wet and fired to become ceramic. Different clay types include porcelain, stoneware, earthenware, and fireclay. The document also outlines steps in working with clay like glazing, firing, throwing, altering, bisque firing, burnishing, and adding textures. Clay can be used to make functional and decorative products.