To Remove Hard Grease, Paint, Etc., From Machinery.
Solutions For Cleaning Metals.—
| I.— | Water | 20 parts |
|---|
| Alum | 2 parts |
| Tripoli | 2 parts |
| Nitric acid | 1 part |
| II.— | Water | 40 parts |
|---|
| Oxalic acid | 2 parts |
| Tripoli | 7 parts |
To Cleanse Nickel.
| II.— | Stearine oil | 1 part |
|---|
| Ammonia water | 25 parts |
| Benzine | 50 parts |
| Alcohol | 75 parts |
Rub up the stearine with the ammonia, add the benzine and then the alcohol, and agitate until homogeneous. Put in wide-mouthed vessels and close carefully.
To Clean Petroleum Lamp Burners.
Gold-ware Cleaner.—
| Acetic acid | 2 parts |
| Sulphuric acid | 2 parts |
| Oxalic acid | 1 part |
| Jewelers’ rouge | 2 parts |
| Distilled water | 200 parts |
Mix the acids and water and stir in the rouge, after first rubbing it up with a portion of the liquid. With a clean cloth, wet with this mixture, go well over the article. Rinse off with hot water and dry.