| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for making a green, gold-alloy ornament and its product in which variety of design for the gold-alloy ornament becomes wider than that so far and even the more colorful gold-alloy ornament is allowed to be made and improvement of an added value of the ornament is greatly expected. SOLUTION: In the method for making the green gold-alloy ornament, a gold-copper alloy is made in such a way that copper in the range of 15-67.5 wt.% is added to gold and processed to be ornament workpiece, and the lustrous, green gold-alloy ornament is made by treating the workpiece to form a tin film onto a surface thereof and form erdigris thereon with any one selected from a group of coloring aqueous solutions of a mixed aqueous solution of acetic acid, copper sulfate, and table salt (1), a mixed aqueous solution of ammonium chloride and dilute sulfuric acid (2), a mixed aqueous solution of copper sulfate, potassium sodium, and caustic soda (3), a mixed solution of copper sulfate, green rust, and alum and a mixed aqueous solution of sodium thiosulfate and lead acetate (4), a mixed aqueous solution of copper acetate, copper nitrate, ammonium chloride, alum, and mercury (II) chloride (5), a mixed solution of ammonium sulfate, copper sulfate, and ammonium (6), a mixed aqueous solution of copper acetate, ammonium chloride, mercury (II) chloride, copper (I) carbonate, and arsenious acid (7), and a mixed aqueous solution of copper sulfate, alum, mercury (II) chloride, copper nitrate, and ammonium chloride.
|
