NOVEL QUINACRIDONE PIGMENT COMPOSITION, AND PROCESS FOR PRODUCTION OF QUINACRIDONE MICROPARTICLES

摘要

Disclosed are: a quinacridone pigment composition containing quinacridone microparticles which have durability and spectral characteristics equivalent to those required for a magenta color of a dye; and a process for producing the quinacridone microparticles. Specifically disclosed are: a quinacridone pigment composition containing at least one type of quinacridone microparticles, wherein the quinacridone microparticles are characterized in that the difference between the maximum transmittance (Tmax1) and the minimum transmittance (Tmin) (i.e., Tmax1 - Tmin) is 80% or more in a transmission spectrum at 350 to 800 nm and the difference between the maximum transmittance (Tmax2) and the minimum transmittance (Tmin) (i.e., Tmax2 - Tmin) is 30% or more in a transmission spectrum at 350 to 580 nm, or that the difference between the maximum transmittance (Tmax1) and the minimum transmittance (Tmin) (i.e., Tmax1 - Tmin) is 80% or more in a transmission spectrum at 350 to 800 nm and the wavelength (?max) at which the transmittance in a transmission spectrum at 350 to 500 nm becomes maximum is less than 430 nm; and a process for producing the quinacridone microparticles.