| 摘要 |
PURPOSE:To perform stable image formation by a simple process and to obtain high transfer efficiency even at high humidity by optimizing the weight mixing ratio of conductive toner and electrostatically charged toner as the mixed toner. CONSTITUTION:A photosensitive body 1 formed by laminating a transparent or translucent conductive layer 1b and a photoconductive layer 1c in order on a transparent base 1a is run and a magnetic brush developing device 2 is provided on the side of the photoconductive layer 1c; and this developing machine 2 performs development simultaneously with image exposure by using the conductive magnetic toner 5a as carriers and mixing triboelectrification type high-resistance magnetic toner 5b which is charged electrostatically to a determined polarity by triboelectrification between a developing machine sleeve 2b and carriers. The mixed toner is obtained by mixing the triboelectrification type high-resistance magnetic toner 5b which has >=10<14>OMEGAcm toner resistivity and is charged to the polarity determined by the triboelectrification with conductive magnetic toner 5a which has >=10<4>-10<9>OMEGAcm toner resistivity at a weight mixing ratio (95-40):(5-60), and the resistance value of the mixed toner is 10<5>-10<10>OMEGAcm. |
