Recently, the National Ceramic Standardization Center held an examination and approval meeting for national and industrial standards of ceramics in Yixing, Jiangsu. The meeting approved the following 1 standards: GB/T 18811 underglaze (medium) colored daily-use porcelain, GB/T 1812 exquisite porcelain, QB/T 3567.1 fine ceramic cooker, QB/T 3567.2 ordinary ceramic cooker, GB/T 12651 allowable limit of lead and cadmium dissolution of ceramic products in contact with food, GB/T. GB/T 858 allowable limit and determination method of lead and cadmium dissolution in ceramic cookers, GB/T 1815 fine ceramics for daily use, rapid analysis method of QB/T ceramic materials, GB/T 6297 differential thermal analysis method of ceramic raw materials for daily use, etc.