Color changing compositions for use on non-porous surfaces

Details Color changing compositions for use on non-porous surfaces Color changing compositions for use on non-porous surfaces

C - Chemistry, Metallurgy

09

D

C09D 11/16 (2006.01)

Patent

CA 2152653

A multiple coloring composition system for use on non- porous surfaces is disclosed whose coloring effect is changed upon treatment with a second coloring composition, once the second coloring composition has been deposited over the undercolor coloring composition. The multiple ink system comprises: (a) an undercolor aqueous coloring composition comprising a film forming resin and an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater and/or by a reducing agent; and (b) an overcolor aqueous coloring composition comprising a film forming resin, a colorant capable of maintaining its characteristic color in the presence of a pH of about 10 or greater and/or a reducing agent, a base in an amount sufficient to yield a pH of the overcolor composition of about 10 or greater, and/or a reducing agent.

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