Professional Clay PF 510 Peter Beard Grogged 100 KgProfessional Clay PF 510 Peter Beard Grogged Available in 25 Kgs bags. Minimum order 100 Kgs. Peter Beards own clay body recipe is made from a blend of the most plastic white ball clays available today. This white firing, medium textured body is most suitable for hand built pieces to create textural surfaces. A combination of molochite and silica sand gives this body low shrinkage, good warp resistance and green strength. CATEGORY: Professional