There are many usages for this ink and you can find many more. Mix the powder with water, and words written by the mixture is undetectable by the naked eye but until baked over fire or iron, all on the paper can be seen.
Features:
White powder
Easy use, just mix with water
Can be used to keep secret
Can not be eaten
Shoule be placed out of children's reach
Condition: High quality remanufactured ink cartridge