Process for the production of decorated tableware with increased resistance to scratches caused by cutlery and coloring substance therefor

US6063446A · kind A · utility

Assignee

• Cerdec Aktiengesellschaft Keramische Farben · DE

Inventors

• Dietrich Speer · Hanau, DE
• Adalbert Huber · Bensheim, DE
• Kai Dorer · Heusenstamm, DE
• Gabriele Wachowitz · Dietzenbach, DE

Key dates

• Filing date: Oct 5, 1998
• Grant date: May 16, 2000
• Expiry date: Oct 5, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The resistance of tableware decorations to cutlery abrasion traces can be increased by using, in the production of the decoration, a decoration coloring substance containing a pigment and a glass flux with the characteristics profile according to the invention: the pigment of the decoration coloring substance has an average grain diameter equal to or less than 2 .mu.m, and the glass flux of the decoration coloring substance has a density equal to or less than 2.6 g/cm.sup.3 and a hemisphere temperature less than 930.degree. C.