How does Sodium CMC Cooperate When Ceramic Glaze Appears Pinhole

Sodium carboxymethyl fibronin (CMC) is a kind of white or light yellow powder and appears as a granular or fibrous solid. It is tasteless, non-toxic, and water-soluble. CMC has been selected as the electrolyte in the production of sanitary ceramics because of its excellent adhesion, suspension, aggregation, and water retention, and can be widely used in ceramic glaze.

In the actual production process of ceramic glaze (wall and floor tile, ceramic tile, etc.), the situation of glaze pinhole often occurs. The small pinpricked hole is called a pinhole. There are a lot of reasons for this situation, for example, the frit is not fully melted, and the temperature difference between the initial melting temperature and the high temperature is too large, or the temperature of the glazed body is too high, which causes the glazed body to be too dry and makes the glaze permeate the glazed body too fast, or other reasons.

There are many commonly used solutions, such as properly increasing the glaze melting temperature, reducing the high-temperature viscosity, improving the quality of frit, appropriately reducing the firing temperature, or increasing the maturity temperature range of surface glaze, etc. But the best way is to improve water retention and prevent excessive dryness and water shortage, which requires the addition of raw materials with good water retention. The CMC produced by Jining Fortune Biotech Co., Ltd. is a good material for water retention and can provide good adhesion. Specific specifications can be customized according to customer requirements, and there are also instant and granular products for selection.