| 摘要 |
PURPOSE:To obtain a sharp high-quality image near a print by specifying weight average particle diameter, and regulating the weight content of particles having particle diameters of >=8mum to <=5%, and the number content of particles having particle diameters of <=2mum to <=15%. CONSTITUTION:The toner particles have a weight average particle diameter of 3-5mum, the weight content of particles having particle diameters of >=8mum to <=5%, and the number content of particles having particle diameters of <=2mum to <=15%. It is preferred that both contents of >=8mum particles and <=2mum particles are as small as possible in order to enlarge the allowances of each development process, such as an electric field and a development gap, thus permitting the obtained image to be free from fog, superior in resolution, and high in image quality near the print. |
