Method for the coloring of ceramic surfaces

US6045859A · kind A · utility

Assignee

• BK Giulini Chemie GmbH & Co. OHG · DE

Inventors

• Thomas Klein · Saratoga, US
• Thomas Staffel · Grünstadt, DE
• Lysander Fischer · Wiesloch, DE
• Richard Walter · Santa Clara, US
• PETER PATZELT · Aschaffenburg, DE

Key dates

• Filing date: Nov 12, 1998
• Grant date: Apr 4, 2000
• Expiry date: Nov 12, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/82
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for coloring ceramic surfaces, wherein the surfaces are treated with an aqueous solution of alkali metal or ammonium dithiosulphatoaurate(I) with a gold concentration of 0.1-10% by weight, the water is evaporated and the dithiosulphatoaurate(I) is decomposed at temperatures of 300-1400.degree. C.