摘要：

A composition comprising(a) an indanthrone blue pigment of formula I ##STR1## and (b) a sulfonated indanthrone blue derivative of formula II ##STR2## wherein X.sup.⊕ is H.sup.⊕ or a group of the formula M.sup.n⊕ /n or N.sup.⊕ (R)(R.sub.1) (R.sub.2) (R.sub.3), M is a monovalent, divalent or trivalent metal cation, n is 1, 2 or 3, each of R, R.sub.1, R.sub.2 and R.sub.3 is independently hydrogen, C.sub.1 -C.sub.18 -alkyl, C.sub.5 -C.sub.6 cycloalkyl, phenyl or phenyl which is substituted by C.sub.1 -C.sub.18 alkyl, or R.sub.2 and R.sub.3, together with the linking nitrogen atom, are a pyrrolidine, imidazoline, piperidine, piperazine or morpholine radical, or R.sub.1, R.sub.2 and R. sub.3, together with the linking nitrogen atom, are a pyrrole, pyridine, picoline, pyrazine, quinoline or isoquinoline radical, and m is a value from 0.2 to 3. When used in varnishes, pigment mixtures of this kind are distinguished in particular by increased color strength, improved rheology and high gloss.

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