| 摘要 |
PURPOSE:To obtain a high-density copied image from the beginning of use by using a toner having the property that the copied image density is high in an initial copying state and decreases on increasing of the number of copying frequencies at the start of copying and using a toner having the property reverse therefrom as a replenisher. CONSTITUTION:A 1st toner having the property that the copied image density is high while the number of use frequencies is low and decreases on increasing of the number of the use frequencies is used during the time from the start of copying before the prescribed number of use frequencies. The 2nd toner having the property that the copied image density is low while the number of the use frequencies is low and increases on increasing of the number of the use frequencies is used as the replenisher at the prescribed number of the use frequencies or above. The general drawback of the electrophotographic device with the copied image density tends to be low particularly at the start of copying is, therefore, overcome. The high-density copied image is thereby obtd. from the beginning of use. |
