Patent ID: 7264663

Claim:
Ink set for ink jet printing consisting of at least one yellow ink, at least one magenta ink, at least one cyan ink and at least one black ink, wherein said magenta ink contains, as first dye component, at least one dye of formula (I), wherein M represents hydrogen, a metal atom or ammonium; R 2 represents COD 1 , where D 1 represents unsubstituted or substituted alkyl, where the substituents are selected from the group consisting of OCH 3 and COOM; unsubstituted phenyl or phenyl substituted with CH 3 , Cl, Br, OH or COOM or represents SO 2 D 2 , here D 2 represents unsubstituted alkyl, unsubstituted phenyl or phenyl substituted with CH 3 , F, Cl or Br and Aryl represents unsubstituted phenyl or phenyl substituted with CH 3 , Cl, Br, COOM or SO 3 M or unsubstituted naphthyl or naphthyl substituted with COOM or SO 3 M, or of formula (II) wherein M represents hydrogen, a metal atom or ammonium; R 1 represents NR 3 R 4 , where R 3 and R 4 independently represent hydrogen; alkyl, substituted alkyl, where the substituents are selected from the group consisting of OH, OCH 3 , COOM and SO 3 M; aralkyl; unsubstituted aryl or substituted aryl, where the substituents are selected from the group consisting of OCH 3 , Cl, Br, COOM and SO 3 M; or represents OR 5 , where R 5 represents hydrogen or alkyl; or represents SR 6 , where R 6 represents alkyl or alkyl substituted with COOM, OH or SO 3 M and Aryl represents unsubstituted phenyl or phenyl substituted with CH 3 , Cl, Br, COOM or SO 3 M or unsubstituted naphthyl or naphthyl substituted with COOM or SO 3 M, and as second dye component, at least one copper complex azo dye of formula (III), or of general formula (IV) wherein M represents hydrogen, a metal atom or optionally substituted ammonium; R 1 represents alkyl with 1 to 4 carbon atoms, substituted alkyl with 2 to 4 carbon atoms, where the substituents are selected from the group consisting of OH; or alkenyl with 2 to 4 carbon atoms; R 2 represents hydrogen or SO 3 M; R 3 represents hydrogen, SO 3 M, NH 2 , NHCOD 1 , where D 1 represents unsubstituted or substituted alkyl with 1 to 6 carbon atoms, where the substituents are selected from the group consisting of COOM, Cl and Br; unsubstituted phenyl or phenyl substituted with CH 3 , Cl, Br, OH, COOM or SO 3 M; or NHSO 2 D 2 , where D 2 represents unsubstituted alkyl with 1 to 6 carbon atoms, unsubstituted phenyl or phenyl substituted with CH 3 , F, Cl or Br; R 4 represents hydrogen, SO 3 M, NH 2 , NHSO 2 D 3 , where D 3 represents alkyl with 1 to 6 carbon atoms; unsubstituted phenyl or phenyl substituted with CH 3 , F, Cl or Br; R 5 represents hydrogen, SO 3 M, COOM or COND 4 D 5 , where D 4 and D 5 independently represent hydrogen, unsubstituted or substituited alkyl with 1 to 6 carbon atoms, where the substituents are selected from the group consisting of OCH 3 , OC 2 H 5 , iso-OC 3 H 7 and OH; R 6 represents hydrogen or SO 3 M and R 7 represents hydrogen or SO 3 M.