| 摘要 |
PROBLEM TO BE SOLVED: To form proper quality color images even for various types of transfer material including the thin transfer material. SOLUTION: In the device, one of measurement means for translucence, whiteness or glossiness TS, WS or KS is installed in a paper feed path of recording paper P which is carried from a paper feed cassette 15. In this case, the attached quantity of the white toner forming a very bottom layer of the recording paper P in a developing device 13(1)W is controlled, by controlling the electrifying voltage of an charging device 11(1)W or the exposure output of an exposure optical system 12(1)W, with regard to the forming of a white toner image according to the measured result. |
