Semi-white glaze frit

Frit

1. Frit is used for architectural porcelain, household porcelain, art porcelain, etc. Frit glazes vary depending on their characteristics.

2. Frit is insoluble and stable. After being ground, it is applied to various vessels, and forms a thin vitreous layer after firing.

3. Frit can be classified into: transparent frit glaze, milky white frit glaze, leaded frit glaze, and lead-free frit glaze. In the melting process, it may have granular and flaky appearances depending on different manufacturing methods. Due to its insolubility, frit glaze is highly safe and can be used alone or added to general raw glaze as a flux.

Frit Functions:

1. Some raw materials, including potassium nitrate, potassium carbonate, and borax, contain carbonates. During frit firing process, these carbonates decompose, releasing carbon dioxide prior to the glazing stage, thus ensuring the flatness of the glaze surface is unaffected.

2. After the formation of frit, the grinding time and fineness are easy to control, and accordingly the glaze slip performance is easier to control:

3. Numerous raw materials used for glaze, if not processed into frit glaze, may affect the glaze expansion coefficient and cause pinholes due to the large loss on ignition during sintering.

4. Some raw materials, such as borax and zinc oxide, are soluble in water or alkaline. If not processed into frits, they may adversely affect the performance of the glaze slip.