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.