Ink set, ink cartridge, inkjet recording method, and recorded matter

An ink set comprising at least a yellow ink composition, a magenta ink composition, and a cyan ink composition:

• said magenta ink composition containing as a colorant at least one type of compound expressed by the following formula M-1, and at least one type of compound expressed by the following formula M-2
• wherein in Formula M-1, A represents a residue of a five membered heterocyclic diazo component A-NH2;
• B1 and B2 each represent —CR1═ or —CR2═, or either one represents a nitrogen atom while the other represents either —CR1═ or —CR2═;
• R5 and R6 each independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, or a sulfamoyl group;
• each group may also have a substitution group;
• G, R1, and R2 each independently represent a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, a cyano group, a carboxyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a hydroxy group, an alkoxy group, an aryloxy group, a silyloxy group, an acyloxy group, a carbamoyloxy group, a heterocycloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group substituted with an alkyl group, aryl group, or heterocyclic group, an acylamino group, a ureido group, a sulfamoylamino group, alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkyl or arylsulfonylamino group, an aryloxycarbonylamino group, a nitro group, an alkyl or arylthio group, an alkyl or arylsulfonyl group, an alkyl or arylsulfinyl group, a sulfamoyl group, a sulfo group, or a heterocyclothio group;
• each group may also have a substitution group;
• and furthermore, R1 and R5 or R5 and R6 bonded together can form a 5 or 6 membered ring
• wherein in Formula M-2, M represents a hydrogen atom, ammonium group, or alkali metal atom, X represents a diaminoalkylene group, and n is either 1 or 2;
• the yellow ink composition containing as a colorant at least one type of compound expressed by the following formula Y-1
• wherein in Formula Y-1, X1, X2, Y1, and Y2 represent a hydrogen atom or a cyano group, Z1 and Z2 represent a substitution group with an aromatic ring, R1 and R2 represent an alkyl group, and M is a metal atom);
• and
• the cyan ink composition containing as a colorant at least one type of compound selected from the group consisting of compounds or salts thereof expressed by the following Formula C-1
• wherein in Formula C-1, X1, X2, X3, and X4 independently represent either —SO—Z or —SO2—Z;
• wherein Z independently represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
• Y1, Y2, Y3, and Y4 independently represent a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an aryl group, a heterocyclic group, a cyano group, an hydroxyl group, a nitro group, an amino group, an alkylamino group, an alkoxy group, an aryloxy group, an amido group, an arylamino group, an ureido group, a sulfamoylamino group, an alkylthio group, an arylthio group, an alkoxycarbonylamino group, a sulfonamide group, a carbamoyl group, an alkoxycarbonyl group, a heterocycloxy group, an azo group, an acyloxy group, a carbamoyloxy group, a silyloxy group, an aryloxycalbonyl group, an aryloxycalbonylamino group, an imido group, a heterocyclothio group, a phospholyl group, an acyl group, or an ionic hydrophilic group, and each of the groups may also have substitution groups;
• a1 through a4 and b1 through b4 represent the number of substitution groups of X1 through X4 and Y1 through Y4;
• furthermore a1 through a4 are independently integers between 0 and 4, but are not all simultaneously 0;
• b1 through b4 are independently integers between 0 and 4;
• M represents a hydrogen atom, a metal atom or oxide thereof, a hydroxide, or a halide;
• with the proviso that at least one of X1, X2, X3, X4, Y1, Y2, Y3, and Y4 is an ionic hydrophilic group or a group which has an ionic hydrophilic group as a substitution group.