| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent selective-developing. SOLUTION: As for the synchronous distribution curve of a synchronous medium resistance additive agent equivalent particle size to the toner base particle equivalent particle size, provided that the toner base particle equivalent particle size equivalent to the surface roughness of the developing roller is expressed by d1 and the toner base particle equivalent particle size equivalent to the toner mean particle size is expressed by d2 (d1<d2), with reference to a virtual reference line which is obtained by taking the medium resistance additive agent coating ratio for the toner base particle equivalent particle size between d1 and d2 as a reference value and fixing the medium resistance additive agent coating ratio obtained from the value, the medium resistance additive agent coating ratio in an area where the toner base particle equivalent particle size is <=d1 and an area where the size is >=d2 is made equal to or exceeds the virtual reference line.</p> |
