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Insect Repellents
| 配方类型： |
ELEMENTARY PREPARATIONS |
| 配方说明： |
Indelible Laundry-Marking Ink |
| 配方组成： |
Water 40 fl oz
Stir until dissolved
Powdered Gum Arabic/1 oz
Water/10 fl oz
A: Silver Nitrate/4 oz
Powdered Gum Arabic/4 oz
A: Soda Ash/1 oz
Lampblack/2 oz |
| 配制方法： |
Stir this in a glass or porcelain dish until dissolved. Do not expose the mixture to strong light or it will spoil. Then pour into a brown glass bottle. In using these solutions, wet the cloth with solution A and allow to dry. Then write on it with solution B using a quill pen. |
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