Patent ID: 7273520

Claim:
Ink set for ink jet printing comprised of at least one yellow ink, at least one magenta ink, at least one cyan ink and at least one black ink, wherein the yellow ink contains a mixture of at least one yellow dye with reddish hue of formula (I), R represents hydrogen or alkyl having from 1 to 6 carbon atoms; M represents hydrogen or a metal atom or ammonium optionally substituted by alkyl, alkoxyalkyl or hydroxyalkyl; R 17 , R 18 independently represent hydrogen, alkyl or alkoxy each having from 1 to 3 carbon atoms; p 4 is from 1 to 3 and the sulfo group is in position 1, 4, 5, 6, 7 or 8 in the case where p 4 is equal to 1; the sulfo groups are in positions 4 and 8, 5 and 7, 6 and 8 or 1 and 5, in the case where p 4 is equal to 2; or the sulfo groups are in positions 3, 6 and 8 or 4, 6 and 8 in the case where p 4 is equal to 3; n, m are each independently from 2 to 6, and at least one yellow dye with greenish hue of formula (II), wherein R represents hydrogen or alkyl having from 1 to 6 carbon atoms; M represents hydrogen or a metal atom or ammonium optionally substituted by alkyl, alkoxyalkyl or hydroxyalkyl; R 6 represents methyl or carboxy; R 7 , R 8 independently represent hydrogen, chloro, bromo or methyl and n, m are each independently from 2 to 6; and wherein the magenta ink ink contains the dye “Magenta 1” of formula or the dye “Magenta 2” of formula or the dye “Magenta 3” of formula or a mixture of these dyes.