| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner excellent in adhesion resistance.SOLUTION: The toner comprises plural toner particles having a core and a shell layer formed on a surface of the core respectively. The shell layer contains a thermosetting resin, and contains at least one of a hydroxyl group and epoxy group at least on a surface. In a test for agitating a mixture of 100 pts.mass of ferrite carrier whose number average particle diameter is 50 μm and 10 pts.mass of the toner, under an environment of temperature at 25°C and humidity of 50%RH, using a Turbula mixer, then stopping agitation after 30 minutes of a time point when a toner charge amount reaches a saturation charge amount, the toner charge amount reaches the saturation charge amount within 30 seconds since agitation is started, a change ratio of the toner charge amount at a time point when 3 minutes have passed since stop of agitation, relative to the saturation charge amount is within 5%, and a change ratio of the toner charge amount at a time point when 10 minutes have passed since stop of agitation, relative to that when agitation is started, is within 10%.SELECTED DRAWING: Figure 1 |
