Laboratory glassware from porcelain

Laboratory equipment: porcelain - the material received from mix of kaolin, quartz, feldspar and other aluminosilicates. As a rule, porcelain products cover with thin coat of glaze of special structure which provides the high abrasive durability and resistance to influence of acids and alkalis. The main advantage of porcelain in comparison with glass - the thermal stability and mechanical strength. Hard porcelain of which make laboratory glassware without covering glaze maintains heating to 1300'C, the porcelain covered with glaze is softened at 1200'C. Porcelain is steady in relation to hot acids, except for hydrofluoric and phosphoric acids. Concentrated solutions of alkalis when heating considerably destroy porcelain. The porcelain laboratory glassware is intended for use when carrying out chemical analysis works and auxiliary operations in chemical analysis laboratories.