| 摘要 |
<p>PURPOSE:To obtain a black-color photosensitive toner having excellent photosensitivity and photosensitivity in a laser wavelength region with which good picture images of black color with enough picture density can be formed by preparing the toner from a resin compsn. containing a binder resin, photoconductive material, colorant and inorg. salt. CONSTITUTION:The toner consists of a resin compsn. containing a binder resin, photoconductive material, quinone-type black dye, and inorg. salt. This black color dye is a mixture of yellow quinone dye, magenta quinone dye and cyan quinone dye. By mixing three color quinone dyes, a black dye is obtd, and by controlling the compounding amts. of three dyes, the color tone of the black toner can be controlled. The binder resin used is an electric insulating resin. The photoconductive material used is an inorg. photoconductive material such as zinc oxide, titanium oxide, cadmium sulfide, cadmium oxide, etc., and especially, zinc oxide is preferably used.</p> |
