Coloring Gold Jewelry.
To Widen A Jewel Hole.
To Clean Jet Jewelry.
Coloring Common Gold.
Shades Of Red, Etc., On Matt Gold Bijouterie.
| I.— | Yellow wax | 32 parts |
|---|
| Red bole | 3 parts |
| Crystallized verdigris | 2 parts |
| Alum | 2 parts |
| II.— | Yellow wax | 95 parts |
|---|
| Red bole | 64 parts |
| Colcothar | 2 parts |
| Crystallized verdigris | 32 parts |
| Copper ashes | 20 parts |
| Zinc vitriol | 32 parts |
| Green vitriol | 16 parts |
| Borax | 1 part |
The wax is melted and the finely powdered chemicals are stirred in, in rotation. If the gilt bronze goods are to obtain a lustrous orange shade, apply a mixture of ferric oxide, alum, cooking salt, and vinegar in the heated articles by means of a brush, heating to about 266° F. until the shade commences to turn black and water sprinkled on will evaporate with a hissing sound, then cool in water, dip in a mixture of 1 part of nitric acid with 40 parts of water, rinse {432} thoroughly, dry, and polish. For the production of a pale-gold shade use a wax preparation consisting of:
| III.— | Yellow wax | 19 parts |
|---|
| Zinc vitriol | 10 parts |
| Burnt borax | 3 parts |
| Green-gold color is produced by a mixture of: |
| IV.— | Saltpeter | 6 parts |
|---|
| Green vitriol | 2 parts |
| Zinc vitriol | 1 part |
| Alum | 1 part |
To Matt Gilt Articles.
| Saltpeter | 40 parts |
| Alum | 25 parts |
| Cooking salt | 35 parts |