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2015 Ram Chinese Year ceramic cup mug What is the unique role

Ceramic Mug    From:Xinxiang Ceramic Mug Manufacturers     2016-3-10
2015 Ram Chinese Year ceramic mug manufacturers

(1) lead glaze has a wide firing temperature range of the same. Pb0 and Pb3O4 in the glaze can reduce the viscosity of the melt at a high temperature, and provide a wide range of melt temperatures suitable mature, easy firing operation, so that the glaze has a relatively good softening properties: Therefore, producers often used such glaze.

(2) lead glaze has a lower melting temperature. PbO in the glaze additive for network organization. At high temperatures low melt viscosity, good flow properties, and create the conditions for the glaze covering body and easy to dry. Therefore, widely used since ancient times as a producer.

(3) lead glaze has a lower surface tension. Thus has a suitable uniform mobility spinach brightness and opacity, but also help to overcome the applied glaze glazed green body cracking and other surface defects during the drying process. Therefore, people called lead glaze can play in the blanks "panacea" effect.

(4) lead glaze having good transparency. Pb0 present in the glaze on the surface of the crystal can be reduced any possibility of crystallization, in particular to prevent devitrification of the glaze layer, therefore, lead glaze transparency is very desirable.

(5) lead glaze has a high refractive index. Because of the high refractive index lead glaze, making lead glaze glazed finish particularly well.

Due to the above advantages lead glaze, simply select the appropriate formula, to scientific production technology, lead glaze can control the amount of lead leaching requirements defined below, will also be able to limit the ceramic tableware of lead poisoning. Generally considered: the production of a lead glaze frit, and the body and glaze firing unglazed taken, the amount of lead leaching lead glaze them in 4% acetic acid leached solution can be controlled at around 0.5ppm. Therefore, companies are still using lead glaze ceramic tableware for covering glaze.
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