The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1996
Filed:
Mar. 29, 1995
Cerdec Aktiengesellschaft Keramische Farben, Frankfurt am Main, DE;
Abstract
Purple colors based on colloidal gold on stovable substrates and the use thereof for the production of purple decoration on glass, ceramics and porcelain are known. The production of such purple colors is elaborate. Agents according to the invention should be viewed as pigment precursors, wherein the pigment is formed during firing of the decoration. The agents contain a gold compound, with the exception of gold oxide, which may be decomposed to colloidal gold on firing of the decoration and a finely divided glass flux in a weight ratio of gold to glass flux of between 1:10 and 1:2,000. Preferred agents contain HAuCl.sub.4, Au.sub.2 S.sub.3, AuCN or KAu(CN).sub.2 as the gold compound and a lead-free glass frit as the glass flux. The agents may be obtained by grinding the glass flux with a gold compound. Purple decoration is obtained by applying the agent to the substrate to be decorated and storing at 400.degree. to 1,050.degree. C.