Method of colouring tin and tin-containing articles

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United States of America Patent

PATENT NO 9163312
APP PUB NO 20120000412A1
SERIAL NO

13125510

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Abstract

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A method of coloring the surface of a tin-containing article is provided, the method comprising contacting at least a portion of the surface of the article with a solution comprising a thiosulphate, preferably under substantially neutral or acidic conditions. In one embodiment, the solution contains sodium thiosulphate and citric acid and further comprises a copper salt, together with acetone and/or glycerol. The method is preferably conducted at elevated temperatures, in particular by heating the solution to a temperature of from 45 to 85° C. The method is particularly suitable for the coloring of pewter articles, but may be applied to a wide range of tin-containing materials and tin alloys.

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Patent Owner(s)

Patent OwnerAddress
UNIVERSITY OF PLYMOUTHDRAKE CIRCUS PLYMOUTH PL4 8AA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Woods, Trish Plymouth, GB 1 5

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