Color changing compositions for highlighters
First Claim
1. A multiple coloring composition system comprising:
- (a) an aqueous undercolor coloring composition comprising a undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater, in the presence of a reducing agent, or a combination thereof, and a compatible surfactant in an amount sufficient to increase the stability of said coloring composition; and
(b) an aqueous overcolor coloring composition comprising an overcolor dye capable of maintaining its characteristic color in the presence of a pH of about 10 or greater, an effective amount of base sufficient to yield a pH of the aqueous overcolor coloring composition of about 10 or greater, and a compatible surfactant in an amount sufficient to increase the capillary flow of said aqueous overcolor coloring composition.
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Accused Products
Abstract
A multiple coloring composition system is disclosed wherein the coloring effect of a first undercolor coloring composition is changed upon treatment with a second coloring composition, once the second coloring composition has been deposited over the undercolor coloring composition. The multiple coloring composition system comprises:
(a) an aqueous undercolor coloring composition comprising an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater and/or a reducing agent, and a compatible surfactant in an amount sufficient to increase the stability of said coloring composition; and
(b) an aqueous overcolor coloring composition comprising an overcolor dye capable of maintaining its characteristic color in the presence of a pH of about 10 or greater and/or a reducing agent, an effective amount of a base sufficient to yield a pH of the aqueous overcolor coloring composition of about 10 or greater and/or a reducing agent, and a compatible surfactant in an amount sufficient to increase the capillary flow of said aqueous overcolor coloring composition.
The multiple coloring composition system is especially useful for highlighting text inasmuch as the coloring compositions preferably leave the highlighted indicia easily visible.
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Citations
28 Claims
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1. A multiple coloring composition system comprising:
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(a) an aqueous undercolor coloring composition comprising a undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater, in the presence of a reducing agent, or a combination thereof, and a compatible surfactant in an amount sufficient to increase the stability of said coloring composition; and (b) an aqueous overcolor coloring composition comprising an overcolor dye capable of maintaining its characteristic color in the presence of a pH of about 10 or greater, an effective amount of base sufficient to yield a pH of the aqueous overcolor coloring composition of about 10 or greater, and a compatible surfactant in an amount sufficient to increase the capillary flow of said aqueous overcolor coloring composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An overcolor coloring composition comprising (a) from about 0.1% to about 12% by weight of a base;
- (b) from about 1% to about 20% by weight of a reducing agent;
(c) from about 0.05% to about 15% by weight of an overcolor dye which maintains its characteristic color in the presence of said reducing agent and said base; and
from about 0.5% to about 20% by weight of a surfactant.
- (b) from about 1% to about 20% by weight of a reducing agent;
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23. An undercolor coloring composition comprising (a) an effective amount of an acid sufficient to maintain the pH of said undercolor coloring composition at from about 3 to about 6;
- (b) from about 0.05% to about 1% by weight of an undercolor dye; and
(c) from about 20% to about 60% by weight of a surfactant.
- (b) from about 0.05% to about 1% by weight of an undercolor dye; and
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24. A color changing marking system comprising at least an undercolor marking instrument and an overcolor marking instrument,
said undercolor marking instrument containing an undercolor coloring composition comprising (a) an effective amount of an acid sufficient to maintain a pH of said undercolor coloring composition at from about 3 to about 6; - (b) from about 0.05% to about 15% by weight of an undercolor dye; and
(c) from about 20% to about 60% of a surfactant,and said overcolor marking instrument containing an overcolor coloring composition comprising (a) from about 0.1% to about 12% by weight of a base;
(b) from about 1% to about 20% by weight of a reducing agent;
(c) from about 0.05% to about 15% by weight of an overcolor dye which maintains its characteristic color in the presence of a reducing agent and base in an amount from about 10% to about 12% by weight; and
from about 0.5% to about 20% by weight of a surfactant, said undercolor coloring composition losing its color upon contact with said overcolor coloring composition. - View Dependent Claims (25, 26, 27)
- (b) from about 0.05% to about 15% by weight of an undercolor dye; and
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28. A multiple coloring composition system comprising:
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(a) an aqueous undercolor coloring composition comprising an undercolor dye whose coloring ability is destroyed in the presence in the presence of a pH of about 10 or greater and/or a reducing agent, and a compatible surfactant in an amount sufficient to increase the stability of said coloring composition; and (b) an aqueous overcolor coloring composition comprising an overcolor dye capable of maintaining its characteristic color in the presence of a reducing agent, an effective amount of a reducing agent sufficient to destroy the coloring ability of said undercolor dye, and a compatible surfactant in an amount sufficient to increase the capillary flow of said aqueous overcolor coloring composition.
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Specification