Eradicable inks

Details Eradicable inks Eradicable inks

1997-03-25

1999-06-29

Harrison, Robert H.

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3101, 106 3113, 106 3127, 25218313, C09D 1118, C09B 1120, C09B 6904

Patent

active

059163577

ABSTRACT:
An eradicable ink contains an essentially non-aqueous solvent and a colorant, dissolved in the solvent, that changes color if contacted with a sulfite or an amine. Moreover, a water soluble colorant containing a counterion hydrophilic can be converted into a water insoluble colorant by substituting a hydrophobic counterion for the hydrophilic counterion.

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