| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing unit that reduces a problem as much as possible relating to significantly noticeable contamination because of a black toner by partially replacing a black toner by a Y (yellow) toner that is less noticeable. <P>SOLUTION: The monochromatic developing unit 1 uses a nonmagnetic single component toner and uses a toner cartridge 1b filled with the toner in a specified lifetime set on the toner until exchanging, wherein the toner cartridge 1b partially stores a yellow toner, and charging property of the yellow toner is different from that of the black toner. <P>COPYRIGHT: (C)2008,JPO&INPIT |
