B - Operations – Transporting – 44 – C
Patent
B - Operations, Transporting
44
C
117/103, 41/2
B44C 1/00 (2006.01) B05D 3/10 (2006.01) B05D 5/06 (2006.01) B44C 1/04 (2006.01) B44D 2/00 (2006.01)
Patent
CA 1095714
ABSTRACT OF THE DISCLOSURE A process for making a decorative article is provided by selectively oxidizing at least one layer of oxidizable metal to produce color changes in the layer(s) and selectively termin- atine the oxidation of the metal to set the color in the layer(s) with the desired decora- tive effect. Preferably, the oxidizable metal is in the form of finely divided particles such as iron, copper or brass powder, which may be adhesively or cohesively secured to a substrate which is preferably porous. Oxidation may be carried out by wetting the metal with a corros- ive liquid or humidity in an oxygen containing atmosphere, and the rate and extent of oxidation may be controlled mechanically by occlusive dressings and/or chemically by the use of catalysts. The resulting article exhibits predetermined color patterns characteristic of varius stages of oxi- dation of the metal. V ?116-1 -1-
318014
Gowling Lafleur Henderson Llp
Greenspan Donald J.
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