| 摘要 |
PROBLEM TO BE SOLVED: To provide a colored magnetically attachable toner powder adapted particularly to use in an electrophotographic printing or copying machine. SOLUTION: The colored magnetically attachable toner powder contains a magnetically attachable material, a thermoplastic resin and a coloring substance comprising a mixture of fluorescent dyes including at least one dye of a specified formula as a coloring component, wherein X<SP>-</SP>is an anion such as a tetrafluoroborate, boron fluoride, perchlorate, hexafluorozirconate or ethyl sulfate anion. A combination of C.I. Basic Violet 11:1 (C.I. 45174) and a yellow fluorescent dye is preferably used as the dyes. Improved magenta and red toner powders are also obtained by this method. COPYRIGHT: (C)2005,JPO&NCIPI
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