Pigment inks having excellent image and storage properties
AssigneeEastman Kodak Company
InventorRichard P. Szajewski
Life of this patent
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Abstract
This invention relates to an ink jet ink comprising water, a charged self-dispersed pigment characterized in having a charge equivalence of at least 0.5 mEq/g, a volatile counterion content of 0.01 to 0.5 percent by weight, and a surface-active paper penetrant.
Claims25
An ink jet ink comprising water, a charged self-dispersed pigment characterized in having a charge equivalence of at least 0.5 mEq/g, a volatile counterion content of 0.01 to 0.5 percent by weight, and a surface-active paper penetrant.
An ink jet ink comprising water, a charged self-dispersed pigment characterized in having a charge equivalence of at least 0.5 mEq/g, a volatile counterion content of 20 mol % to 200 mol % based on said charge equivalence, and a surface-active paper penetrant.
An ink jet ink set comprising distinct cyan, magenta, yellow and black inks, at least one of which is an ink jet ink comprising water, a charged self-dispersed pigment characterized in having a charge equivalence of at least 0.5 mEq/g, a volatile counterion content of 0.01 to 0.5 percent by weight, and a surface-active paper penetrant.
Dependencies are inferred from the claim text.