C.I. pigment blue 80-based blue dye

摘要

A pigment preparation which is characterized by a content ina) a benzimidazolonedioxazine compound of formula (I) as base pigment; andb) a dioxazine compound of the general formula (IV) as pigment dispersant; whereinQ represents an m-valent radical of a compound of formula (III),; wherein m is a number from 1 to 4.