Composition For Cleaning Copper, Nickel, And Other Metals.
Putz Pomade.
| II.— | Oxalic acid | 1 part |
|---|---|---|
| Peroxide of iron (jewelers’ rouge) | 15 parts | |
| Rotten stone | 20 parts | |
| Palm oil | 60 parts | |
| Petrolatum | 5 parts |
Pulverize the acid and the rotten stone and mix thoroughly with the rouge. Sift to remove all grit, then make into a paste with the oil and petrolatum. A little nitro-benzol may be added to scent the mixture.
| III.— | Oleine | 40 parts |
|---|---|---|
| Ceresine | 5 parts | |
| Tripoli | 40 parts | |
| Light mineral oil (0.870) | 20 parts |
Melt the oleine, ceresine, and mineral oil together, and stir in the tripoli; next, grind evenly in a paint mill.
To Clean Gummed Parts Of Machinery.
To Remove Silver Plating.
II.—Stripping silvered articles of the silvering may be accomplished by the following mixture: Sulphuric acid, 60° B., 3 parts; nitric acid, 40° B., 1 part; heat the mixture to about 166° F., and immerse the articles by means of a copper wire. In a few seconds the acid mixture will have done the work. A thorough rinsing off is, of course, necessary.