QUINACRIDONE HAVING FRICTION ELECTRIC EFFECT ADJUSTED SELECTIVELY

PURPOSE: To triboelectrically neutralize a pigment by incorporating one or more kinds of triboelectrically active specified compds. CONSTITUTION: A triboelectrically active pigment represented by formula I is allowed to exist in a quinacridone pigment by about 0.05-100wt.%. In the formula I, Q is an optionally substd. residue of quinacridone, the substituent is halogen, 1-6C alkyl, 1-6C alkoxy, etc., A is a direct bond, a crosslinking group such as-O-, -S- or -CO- or a chemically proper combination of such crosslinking groups, Y is an optionally substd. 5- to 7- membered hetero ring contg. 1-3 hetero atoms selected from among N, O and S, the substituent is 1-4C alkyl, etc., and (n) is 1-4. The electrostatic chargeability of a toner or a developer is not affected by the pigment.