| 摘要 |
Dry toners for developing latent electrostatic images in electrostatic recording and printing methods contain, as charge-control substance, a pigment of the formula F+A-(I) in which F represent a cationic radical of a methine dyestuff and A- represents an anion of a heteropolyacid based on tungsten and/or molybdenum with phosphorus, silicon, vanadium, cobalt, aluminum, manganese, chromium and/or nickel or a copper(I) hexacyanoferrate anion.
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