| 摘要 |
<p>PURPOSE: To provide a toner, by which an image with a quality equal to that for an initial image can be provided in repeated use and a fluctuation in a changing quantity is extremely lowered, and a two-component group electrophotography developer, which uses this toner, possesses a stable frictional charging property, and can provide an image with high faithfulness as well as the initial image. CONSTITUTION: A toner contains a binder resin, a coloring agent, and a charge controlling agent represented by the formula as principal constituents, while an electrophotography developer consists of the toner and a carrier provided with a silicone resin coating layer containing conductive grains and a silane coupling agent. In the formula, R1 represents a hydrogen atom, an aryl group, an alkyl group with a number of carbon of 1-6, or a nitro group. R2 represents a hydroxyl group, a carboxyl group, or a formyl group.</p> |
