Process and agent for the production of purple decoration

Details Process and agent for the production of purple decoration Process and agent for the production of purple decoration

1995-03-29

1996-12-31

Ryan, Patrick

Stock material or miscellaneous articles

Composite

Of quartz or glass

428195, 428201, 428203, 428404, 428472, 524431, 524432, 524433, 427214, 427217, B32B 900

Patent

active

055892736

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.

REFERENCES:
patent: 3887383 (1975-06-01), Nesteruk
patent: 4871790 (1989-10-01), Lamanna et al.
patent: 5252522 (1993-10-01), Dorbath et al.
Yamazaki et al., Patent Abstracts of Japan, vol. 7, No. 131 (C-169) 8 Jun., 1983, JP-A-58 045 137.

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