Porcelain Clay Margaret Frith 100 KgPorcelain Clay Margaret Frith Available in 25 Kgs bags. Minimum order 100 Kgs. This Porcelain has been developed as an alternative to our Sliphoused range. Using the whitest powdered ingredients and homogenised using our specialised mixing equipment, this method long being the preferred way by many potters of offering more plasticity and throwability (due to us not being in control of the quality of the powders slight specking may be observed).