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US 4,933,250 AGranted
Magenta color toner for developing latent electrostatic images in color electrophotography
AssigneeRicoh Company, Ltd.
InventorsNobuhiro Nakayama, Yasuo Asahina, Mitsuo Aoki, Hiroyuki Fushimi, Kayo Makita
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Abstract
A magenta toner is disclosed, which comprises a coloring composition comprising a thioindigo pigment, and a xanthene dye having general formula (I) or a laked xanthene dye thereof, and a binder resin: ##STR1## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6, and R.sup.7 each represent hydrogen or a lower alkyl group; R.sup.3 and R.sup.4 each represent a lower alkyl group; and A.sup.- represents halogen.
Claims15
A magenta toner comprising:
- a coloring composition comprising a thioindigo pigment, and a xanthene dye having general formula (I) or a laked xanthene dye thereof, and
- a binder resin:
- ##STR7## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6, and R.sup.7 each represent hydrogen or a lower alkyl group;
- R.sup.3 and R.sup.4 each represent a lower alkyl group;
- and A.sup.- represents halogen.
2 more elements
Dependencies are inferred from the claim text.