| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a color image forming method of a good picture tone which decreases the differences in the gloss between a color image and a black and white image. SOLUTION: A fixing process step in the full-color image forming method has a fixing belt passed round a fixing roller and a backup roller, heats this fixing belt by at least one heating element, brings a pressurizing roller into pressurized contact with the fixing roller as a roller pair and fixes the toner image on a recording medium. The toners consist of at least a binder resin, coloring agents and charge control agent. The coloring agents are the full-color toners of yellow, magenta, cyan and black and when the softening temperature of the binder resin of the black toner is defined as BTs and the softening temperatures of the binder resins of the yellow, magenta and cyan are the same and are defined as CTs, the following conditions are satisfied. BTS<82 deg.C, CTs=65 to 78 deg.C and 2 deg.C<BTs-CTs<17 deg.C.</p> |
