Patent ID: 7244299

Claim:
An ink jet recording ink comprising at least a copper phthalocyanine dye represented by the following general formula (1) and a compound represented by the following general formula (2): wherein M represents an alkali metal or ammonium, R 7 represents OH, COOM, or R 8 COOM in which R 8 represents an alkyl group having 4 to 9 carbon atoms and M represents an alkali metal or ammonium, and x, y, and z each independently represent an integer of 0 to 4, wherein R 1 and R 2 each independently represent a substituted or unsubstituted alkyl group, aryl group, or arylalkyl group, or a hydrogen atom, R 3 and R 5 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, R 4 and R 6 each independently represent a group except those defined for R 3 and R 5 , 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; wherein the content of the compound represented by the general formula (2) is 0.1 mass % or more and 3.0 mass % or less with respect to the total mass of the ink jet recording ink; wherein the content of the compound represented by the general formula (1) is 0.5 mass % or more and 5.0 mass % or less with respect to the total mass of the ink jet recording ink; and wherein an absorption spectrum of the copper phthalocyanine dye represented by the general formula (1) satisfies the following conditions (1) and (2): (1) the absorption spectrum has peaks in both a wavelength range of 600 nm to 640 nm and a wavelength range of 650 nm to 680 nm, and (2) the ratio between peak values of the absorption spectrum satisfies the following relationship: B/A < 0.75 wherein ‘A’ represents a peak value of the absorption spectrum in the wavelength range of 600 nm to 640 nm, and ‘B’ represents a peak value of the absorption spectrum in the wavelength range of 650 nm to 680 nm.