Use of a dyestuff for ink jet printing recording materials

A dyestuff mixture comprising at least one compound of formula (I)

• as free acid or in salt form and at least one compound selected from the group consisting of formula (II), formula (III), formula (IV), and formula (V) wherein the compound of formula (II) is
• wherein
• R7 and R′7 are independently from each other H or halogen,
• R8 is —OH or NR16R17, wherein
• R16 is H;
• unsubstituted C1-4alkyl;
• substituted C1-4alkyl;
• unsubstituted phenyl or a substituted phenyl,
• R17 is unsubstituted C1-4alkyl;
• substituted C1-4alkyl;
• unsubstituted phenyl or a substituted phenyl,
• R9 is O or NR17, wherein
• R17 has the same meaning as defined above,
• R10 and R′10 are independently from each other H;
• halogen;
• unsubstituted C1-2alkyl or —NO2,
• R11 is —SO3H or —COOH,
• R12 is H or halogen,
• R13 is H;
• —SO3H or halogen
• R14 is H or halogen,
• R15 is H or halogen,
• wherein the compound of formula (III) is
• wherein
• R16 is H;
• —COC1-2alkyl;
• —CO(CH2O)n—R22;
• or —SO2R22, wherein
• R22 is an unsubstituted phenyl or a phenyl moiety, which is substituted by at least one substituent selected from the group consisting of —CH3 and halogen,
• n is 0 or 1,
• R19 is H;
• —CH3;
• —SO3H or —OR23, wherein
• R23 is —CH3;
• unsubstituted phenyl;
• substituted phenyl or benzyl
• R20 is H;
• halogen;
• C1-10alkyl or —NHCOCHBrCH2Br
• R21 is H;
• —NO2;
• C1-15alkyl or C5-7cycloalkyl;
• wherein the compound of formula (IV) is
• wherein
• R24 is H or —SO3H,
• R25 is H;
• —NHCOC1-2alkyl or —OH,
• R26 is H or —OH;
• R27 is
• wherein
• R28 is H or unsubstituted phenyl,
• R29 is H;
• —COH;
• —NO2;
• wherein
• R30 is H or —CH3, or
• R27 is
• wherein the compound of formula (V) is
• wherein
• R31 is H or
• R32 is
• wherein
• R33 is H;
• —SO3H;
• —CF3;
• —Cl;
• —COOC1-2alkyl;
• or —SO2R36, wherein
• R36 is unsubstituted phenyl;
• substituted phenyl;
• O-phenyl;
• —NH—C1-12alkyl;
• —N(C1-6alkyl)2;
• unsubstituted C5-8cycloalkyl;
• substituted C5-8cycloalkyl;
• C5-8cycloalkyl with at least one N, O or S atom incorporated into the ring;
• R34 is H;
• —NHCOC1-4alkyl;
• —NHCOphenyl, wherein the phenyl ring is unsubstituted or substituted;
• —N(C1-2alkyl)COC1-4alkyl;
• —N(C1-2alkyl)COphenyl, wherein the phenyl ring is unsubstituted or substituted;
• unsubstituted phenyl;
• substituted phenyl;
• O-phenyl, wherein the phenyl is unsubstituted or substituted;
• halogen;
• —SO3H;
• —NHCOOC1-2alkyl;
• —NHCOOC5-7cycloalkyl, wherein the cycloalkyl is substituted or unsubstituted and —SO2NHphenyl, wherein the phenyl ring is unsubstituted or substituted,
• R35 is H;
• —NHCOC1-4alkyl;
• —NHCOphenyl, wherein the phenyl ring is unsubstituted or substituted;
• —N(C1-2alkyl)COC1-4alkyl;
• —N(C1-2alkyl)COphenyl, wherein the phenyl ring is unsubstituted or substituted;
• unsubstituted phenyl;
• substituted phenyl;
• O-phenyl, wherein the phenyl is unsubstituted or substituted;
• halogen;
• —Cl;
• —CH3;
• —COOC1-4alkyl and —SO2NHphenyl, wherein the phenyl ring is unsubstituted or substituted.