Inks comprising modified pigments and methods for making and using the same
First Claim
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1. A method of making an ink composition comprisingsulfonating a pigment;
- subsequently oxidizing the pigment to produce a modified pigment; and
incorporating the modified pigment into an ink.
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Abstract
An ink composition that includes a self-dispersing pigment that has about 0.02 to about 1.0 mMoles of S and about 0.2 to about 2.0 mMoles of active hydrogen per gram of pigment, water, and an organic solvent. A method of making an ink composition that includes sulfonating a pigment, subsequently oxidizing the pigment to produce a modified pigment, and incorporating the modified pigment into an ink.
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27 Claims
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1. A method of making an ink composition comprising
sulfonating a pigment; -
subsequently oxidizing the pigment to produce a modified pigment; and incorporating the modified pigment into an ink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification