pottery clay - 5 lb of low fire cone 06 white clay - rocky mountain clay ct3 rocky mountain clay this package contains moist de-aired ct3 pottery clay made by rocky mountain clay. ct3 is a basic white earthenware clay that is smooth, plastic, low fire, and suitable for throwing and sculpture. ideal for beginners and schools. commercial glazes are compatible without crazing. ct 3 is a desired clay in schools and for potters. characteristics: cone: 06, wet color: gray, fire color: white, oxidation: white, reduction: n/a, texture: smooth, penetrometer target: 7.5, avg. shrinkage ±2%: 8%, avg. water absorption ±1%: 11.5%