Professional Clay PF 610 Architectural Handbuilding 100 KgProfessional Clay PF 610 Architectural Handbuilding Available in 25 Kgs bags. Minimum order 100 Kgs. A cheaper alternative to T Material this excellent hand building body contains a high percentage of fine to medium molochite. This gives it superb sculptural qualities with very low shrinkage, approximately 6% at 1280C. PF 610 is for potters who need a clay that does not warp under extreme conditions. It can be used with confidence to create even the