Ink composition
First Claim
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1. A colorless, transparent ink composition consisting essentially of an alkaline aqueous medium and an amine complex salt of zinc dissolved in said aqueous medium, said complex salt being the reaction product of ammonia and zinc hydroxide, said ink composition turning white upon use.
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Abstract
An aqueous transparent ink composition affording white ink patterns which are erasable with weakly acidic or ammoniacal liquid, and including an aqueous medium, and an ammine complex salt of zinc dissolved in the aqueous medium.
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5 Claims
- 1. A colorless, transparent ink composition consisting essentially of an alkaline aqueous medium and an amine complex salt of zinc dissolved in said aqueous medium, said complex salt being the reaction product of ammonia and zinc hydroxide, said ink composition turning white upon use.
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