Patent ID: 7249834

Claim:
An inkjet recording ink comprising at least one magenta dye dissolved and/or dispersed in an aqueous medium, wherein a wavelength (λmax) at the maximum reflection density of the ink is in a specific wavelength range (λex) and a reflection density at the specific wavelength (λer) longer than the λmax is not more than x % of the maximum reflection density, the λex is from 530 to 580 nm, λer is 600 nm and x is 50, and the magenta dye is an azo dye represented by the following formula (1) having an absorption maximum in a spectral range of from 500 to 580 nm in the aqueous medium and an oxidation potential more than 1.0 V(vs SCE): wherein A represents a 5-membered heterocyclic group, B 1 and B 2 each represents ═CR 1 — or —CR 2 ═ or either one of B 1 and B 2 represents a nitrogen atom and the other represents ═CR 1 — or —CR 2 ═, R 5 and R 6 each independently represents a hydrogen atom or a substituent, the substituent is 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, the hydrogen atom of each substituent may be substituted, G, R 1 and R 2 each independently represents a hydrogen atom or a substituent, the substituent is 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 aryloxy-carbonyl group, a heterocyclic oxycarbonyl group, an acyl group, a hydroxy group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, a silyloxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group, an acylamino group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a heterocyclic sulfonylamino group, a nitro group, an alkylthio group, an arylthio group, a heterocyclic thio group, an alkylsulfonyl group, an arylsulfonyl group, a heterocyclic sulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a heterocyclic sulfinyl group, a sulfamoyl group or a sulfo group, the hydrogen atom of each substituent may be substituted, and R 1 and R 5, or R 5 and R 6 may combine to form a 5- or 6-membered ring.