| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner kit having high charging stability against environmental changes, little difference in the charging property among the color toners and high charging uniformity among toner particles in each color toner. SOLUTION: The toner kit has: a black toner containing a binder resin and a black colorant comprising carbon black; and at least one kind of color toner containing a binder resin and a colorant comprising a chromatic pigment. Further, the toner kit is characterized in that: the binder resin constituting the black toner has an acid value of 15 to 30 (mg KOH)/g and a hydroxyl value of less than 0.1 (mg KOH)/g; and the binder resin constituting the color toner has an acid value of 15 to 20 (mg KOH)/g and a hydroxyl value of 2 to 15 (mg KOH)/g. The binder resin constituting the black toner and the binder resin constituting the color toner are preferably made of vinyl polymers. COPYRIGHT: (C)2008,JPO&INPIT
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