Dye sets for ink-jet ink imaging
AssigneeHewlett-Packard Development Company, L.P.
InventorsTye Dodge, Linda C. Uhlir-Tsang, Hiang P Lauw, Matthew Thornberry
Life of this patent
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Abstract
The present invention is drawn to dye sets for formulating ink-jet inks, including ink sets having six ink-jet inks. In one embodiment, the dye set can comprise a yellow dye for formulating a yellow ink, a pair of magenta dyes for formulating a magenta ink and a pale magenta ink, a pair of cyan dyes for formulating a cyan ink and a pale cyan ink, and a black dye for formulating a black ink-jet ink. The pair of magenta dyes can be a transition metal-containing azo dye and a non-metallized dye. The pair of cyan dyes can be a first copper phthalocyanine dye and a second copper phthalocyanine dye that is different than the first copper phthalocyanine dye.
Claims25
A dye set for formulating ink-jet inks, comprising:
- (a) a black dye having a structure as in Formula I:
- and
- (b) at least one colored dye selected from the group consisting of a cyan dye, a magenta dye, and a yellow dye,
- said cyan dye having a structure as in Formula II:
- wherein each R group is independently selected from the group consisting of H, SO3H, SO2NH2, and SO2NH-alkyl-OH, with the proviso that an average of from 2 to 6 R groups are other than H,
- said magenta dye being a Ni2+ complex of a structure as in Formula III:
- said yellow dye having a structure as in Formula IV, as follows:
A dye set for formulating ink-jet inks including a first cyan dye and a second cyan dye, each having the same general chemical formula:
- wherein each R group is independently selected from the group consisting of H, SO3H, SO2NH2, and SO2NH-alkyl-OH, with the proviso that an average of from 2 to 6 R groups are other than H, said first cyan dye having an average of 0.25 to less than 1.5 of the SO2NH-alkyl-OH groups, and said second cyan dye having an average of 1.5 to 3 of SO2NH-alkyl-OH groups.
A dye set for formulating ink-jet inks, comprising a pair of magenta dyes for formulating a magenta ink and a pale magenta ink, wherein the pair of magenta dyes are used to formulate the magenta ink, where only one of the pair of magenta dyes is used to formulate the pale magenta ink, and wherein the pair of magenta dyes includes a transition metal-containing azo dye.
A dye set for formulating an ink set having at least six ink-jet inks, comprising:
- (a) a yellow dye for formulating a yellow ink;
- (b) a pair of magenta dyes for formulating a magenta ink and a pale magenta ink, said pair of magenta dyes being a transition metal-containing azo dye and a non-metallized dye;
- (c) a pair of cyan dyes for formulating a cyan ink and a pale cyan ink, said pair of cyan dyes being a first copper phthalocyanine dye and a second copper phthalocyanine dye that is different than the first copper phthalocyanine dye;
- and
- (d) a black dye for formulating a black ink-jet ink.
Dependencies are inferred from the claim text.