| 配方类型： |
INKS |
| 配方说明： |
Invisible Ink |
| 配方组成： |
Dextrin/2
This writes practically colorless and turns blue on treating with a
solution of potassium ferricyanide, in water.
No.
Ferrous sulfate/1
Water/9
Glycerin/10
Starch, Soluble/1
Water/9
Cobaltous chloride/2
Phenolphthalein/1
Denatured Alcohol/9 |
| 配制方法： |
This writes colorless and turns blue on treating with awater solution of potassium iodide. |
|
