A Dark Red Indelible Ink.
An indelible red ink for marking linen may be made from the following formula:
Prepare three separate solutions:
| I. | Sodium carbonate | 3 | drs. | |
| Acacia | 3 | " | ||
| Water | 12 | " |
With this moisten the spot to be marked, and dry and smooth with a hot flat iron.
| II. | Platinum bichloride | 1 dr. | |
| Water | 2 oz. |
Trace the letters with this fluid, permit to dry, and finally apply solution.
| III. | Stannous chloride | 1 | dr. | |
| Water, distilled | 4 | " |