A very important use of zinc oxide is the the manufacture of glass and ceramics. One of its main roles is as a fluxing agent in the preparation of frits (a type of ceramic glass that predominantly consists of silica, diboron trioxide, and soda) and enamels for ceramic objects (such as wall and floor tiles, or for sanitary and tableware objects). It is used to reduce the melting temperature; which reduces the energy and equipment requirements while improving the brilliance of color glazes. It is also used in heat-resistant glass, cookware, and specialty glass applications including photochromic lenses. Zinc oxide is also currently used in the fabrication of artistic glass, table and cooking ware or crystalline glass. While our direct grade, and more particularly our EPM grade, is widely used for the production of frits, artistic glasses or enamels also use our different qualities of indirect grades, depending on the chemical quality requested.
Zinc oxide EPM is a direct or American process zinc oxide, which is produced by a reduction-oxidation process. The result is a high-quality zinc oxide with low and controlled lead, cadmium, copper or manganese content and no metallic parts.
The Green Seal granules zinc oxide is a very pure indirect or French process zinc oxide. Obtained by the oxidization of very pure zinc vapour, the powder is afterwards post treated in order to obtain hard granules. The advantages of the granulation for our customers are the flowability, the absence of dust and the easiness to weigh the product.