Powdered Clay Earthstone 'Q' Cast 100 KgPowdered Clay Earthstone 'Q' Cast Available in 20 Kgs bags. Minimum order 100 Kgs. Potters who have struggled with stoneware casting will find this slip a real pleasure to use. Formulated in the Earthstone laboratory, Q Cast is a dependable off white firing stoneware casting slip suitable for oxidisation or reduction firing. It casts more quickly and releases more easily than most other casting slips. Very strong in the wet or greenware stages with