Inks comprising modified pigments and methods for making and using the same

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 oxi...

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Bibliographic Details
Main Authors Kennedy, Jeff, Graff, Diane V, Gloster, Daniel F, Bogomolny, Michael, Sujeeth, Puthalath K, Cross, Ryan
Format Patent
LanguageEnglish
Published 24.04.2012
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Summary: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.