Patent ID: 7249834
Filing Date: 2007-07-31
Classification: B41M,C09D

Abstract:
1. 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