| 摘要 |
PURPOSE:To make improvements in developability and image density as well as to make it have sufficient transferability by providing a nonisolable fine grain locally on an isolative toner grain surface, and letting a toner grain act as its isolability in a static manner. CONSTITUTION:A nonisolable fine grain stuck fast to an isolative toner grain surface is locally provided on a toner surface, and this toner grain acts as its isolability in a static manner. This nonisolable fine rain receives an electric load from a latent image, and this part shows an electric potential approximating to the latent image after the toner grain is stuck onto the latent image, whereby a new toner grain is further stuck onto the toner grain, therefore plural layers of toners are stuck onto the latent image, thereby making image density improvable in consequence. On the other hand, at time of transfer, the nonisolable fine grain stuck onto the toner surface is merely provided locally and discontinuous, so that at time of electrostatic transferring, such a fear that the electric charge will run past on the toner surface is not caused, thus good transferability is secured. With this constitution, sufficient image density is securable and simultaneously both of good developability and transferability are securable too. |
