Bright precious metals preparation for baking in at high temperatures and uses thereof for producing decorative bright precious metal elements
AssigneeFerro Corporation
InventorsHans Groh, Lutz Poth, Peter Lang
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Abstract
Bright noble metal preparations for the production of bright noble metal decoration contain at least one noble metal compound and at least one non-noble metal as flux dissolved in a carrier medium. Preparations according to the invention, which are stoved at 1050 to 1300° C., contain as flux at least one cobalt compound in a quantity of 0.3 to 1.0 wt. %, calculated as CoO, and a chromium compound in a quantity of 0.2 to 0.7 wt. %, calculated as Cr2O3. The ratio by weight of Cr2O3 to CoO is in the range from 1.0-2.3.
Claims9
Bright noble metal preparation for the production of bright noble metal decoration stoved at 1050° to 1300° C. comprising one or more organic noble metal compounds in a quantity corresponding to 6 to 16 wt. % of noble metals, a flux of at least two non-noble metal compounds and an organic or organic/aqueous or substantially aqueous carrier medium, in which the noble metal and non-noble metal compounds are substantially dissolved, wherein the flux contains at least one chromium compound in a quantity of 0.3 to 1.0 wt. %, calculated as Cr2O3, and a cobalt compound in a quantity of 0.2 to 0.7 wt. % calculated as CoO, wherein the ratio by weight of Cr2O3 to CoO is in the range of 1.0 to 2.3.
Dependencies are inferred from the claim text.