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US 2006/0065157 A1Published application
Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMinako Kawabe, Koichi Osumi, Shinichi Tochihara, Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami, Itaru Tsuji
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Abstract
An ink comprising yellow colorants and a colorant having a phthalocyanine skeleton, in which the yellow colorants are at least a colorant represented by the following general formula I and C.I. Direct Yellow 132.
Claims8
An ink comprising yellow colorants and a colorant having a phthalocyanine skeleton, wherein the yellow colorants comprise at least a colorant represented by the following general formula I and C.I. Direct Yellow 132
- wherein R1 and R2 each independently represent a substituted or unsubstituted alkyl group, aryl group, or arylalkyl group, or a hydrogen atom;
- R3 and R5 each independently represent a carboxyl group or a salt thereof, a sulfonic group or a salt thereof, a phosphate group or a salt thereof, or an alkyl group in which any one of these groups is substituted;
- R4 and R6 each independently represent a group except those defined for R3 and R5;
- p and r each independently represent an integer of 1 to 5;
- q and s each independently represent an integer of 0 to 4;
- and p+q≦5 and r+s≦5.
3 more elements
Dependencies are inferred from the claim text.