| 摘要 |
PROBLEM TO BE SOLVED: To always keep an image-forming state proper by surely preventing the waste of toner caused by the change of external environment and the lowering of the visibility of an image. SOLUTION: A frame line image G1 formed in an appropriate state at normal temperature and normal humidity (A) is formed to be thin because of the lowering of the developed image state of an electrostatic latent image, and the visibility if lowered in the case of low temperature and low humidity (B). By making the line width of the image G1 large, the visibility of the image G1 is maintained (C). At high temperature and high humidity, the image G1 is formed to be thick because of the improvement of the developed image state of the electrostatic latent image, and much toner is consumed (D). By thinning the line width of the image G1, the consumption of the toner is lowered. Even in such a case, full visibility is secured, because the density of the image G1 is high (E). |
