| abstract |
(57) [Summary] [PROBLEMS] To provide a method for producing a green gold alloy jewelry and a product thereof. SOLUTION: After processing a gold-copper alloy in which copper is added to gold in a range of 15 to 67.5% by weight to obtain a jewelry processed product, This is treated with one of the following coloring aqueous solutions to form a thin film on the surface and form a patina on the surface, thereby producing a shiny green gold alloy jewelry. 1) Aqueous solution of acetic acid, copper sulfate and salt, 2) Aqueous solution of ammonium chloride and dilute sulfuric acid, 3) Aqueous solution of copper sulfate, Rossell salt and caustic soda, 4) A mixed solution of copper sulfate, patina, alum, thiosulfuric acid Mixed aqueous solution of soda and lead acetate, 5) Copper acetate, copper nitrate, ammonium chloride, alum, mixed aqueous solution of mercuric chloride, 6) mixed solution of ammonium sulfate, copper sulfate, ammonia, 7) copper acetate, ammonium chloride, mercuric chloride, copper carbonate, specific acid 8) A mixed aqueous solution of copper sulfate, alum, mercuric chloride, copper nitrate, and ammonium chloride. |