Suitable for use both in the lab and also kitchen environments, Jipo laboratory porcelain is the result of many yearsï¾’ research and specialised experience. It is globally renowned for its high chemical and thermal resisting properties. The bearers of these properties are well developed mullite crystals, not only increasing the softening point but also ensuring both high mechanical resistance and low co-efficient of thermal expansion, the result of which enables the porcelain to withstand high thermal shocks. To assure continued high quality, only the highest grade raw materials are used. The high softening point of laboratory porcelain makes it possible to use glazed articles under suitable conditions at temperatures up to 1100ï¾°C. Diameter 90mm. Supplied in it's own protective box. Porcelain Unglazed 90mm.