Ceramic Colors

Ceramic Colors

 

colored mineral substances that are resistant to high temperatures; they are used to color ceramic products, glazes, and glass. Ceramic colors are finely ground mixtures of mineral pigments with fusible glass (overglaze colors) or with powdered glaze (underglaze colors). There are also colored fusible glazes (majolica colors). Ceramic colors include powdered and liquid preparations of precious metals, such as gold, platinum, and silver.

In the manufacture of ceramic colors, colored mineral substances are obtained from oxides of heavy nonferrous metals or, more rarely, from sulfurous and selenious metal compounds, such as CdS and CdSe. They are also obtained from synthetic colored compounds of natural minerals, such as corundum, spinel, garnet, and zircon. Because spinel and zircon are the most resistant to high temperatures, colored compounds of these two minerals are widely used. Fusible glasses or fluxes are lead borosilicates or alkaline lead aluminoborosilicates.

Depending on their composition and on the article to which they are applied, ceramic colors are fired at different temperatures. Overglaze colors for earthenware are fired at temperatures of 740°–780°C; those used for porcelain are fired at temperatures of 790°–830°C. Underglaze colors used for faience tiles are fired at 950°–1150°C; those for faience plumbing fixtures, at 1100°–1250°C. When overglaze ceramic colors are fired, the flux melts and fuses the pigment to the surface of the glaze. Underglaze ceramic colors are applied directly to the surface of the article and then covered with the glaze.

REFERENCES

Vizir, V. A., and M. A. Martynov. Keramicheskie kraski. Kiev, 1964.
Shaw, K. Ceramic Colors and Pottery Decoration. [2nd ed.] New York, 1969.

S. G. TUMANOV

References in periodicals archive ?
We coat headers, exhaust pipes, radiators, motorcycle parts, pistons, bearings, and more in ceramic colors like; polished aluminum, satin black, bright silver, and titanium finishes.
Heraeus Purchases BASF Catalysts' Ceramic Colors and
Recently, I began working with prepared ceramic colors called Velvets.
Pigments include cadmium types, complex inorganics, ceramic colors, cobalt pigments, and transparent iron oxides.
Ferro also acquired the glazes, pigments and auxiliary businesses from Heraeus to further establish the Company as a market leader in the ceramic colors industry.
In the Halloween spirit, they come in Black and Cinnabar, two new Chantal ceramic colors.
Offers cadmium pigments, mixed metal oxide pigments, ceramic colors, cobalt pigments, and transparent iron oxides.
Ferro will also acquire the glazes, pigments and auxiliary businesses from Heraeus to further establish the company as a market leader in the ceramic colors industry.
Heraeus core business, such as Electronic Materials, Ceramic Colors, Materials Technology, Precious Metal Chemicals and Precious Metal Refining in order to support internal and external growth.
Offers a complete line of cadmium pigments, mixed metal oxide pigments, ceramic colors, cobalt pigments, and transparent iron oxides.
The inherent characteristics of ceramic composition inks create the need for a specialized flatbed inkjet printer with color management tuned to the distinctive ceramic colors in order to generate the widest and most attractive color gamut.