| abstract |
Provided are an intermediate transfer type image forming apparatus and an ink set which can improve the image quality on an intermediate transfer member and can transfer the image formation on the intermediate transfer member to the recording medium satisfactorily and at high speed. . An intermediate transfer body that carries an ink image, a treatment liquid applying section that applies a processing liquid onto the intermediate transfer body, an ink discharge section that discharges ink onto the processing liquid, and an intermediate transfer body. In the image forming apparatus including the transfer unit 18 that transfers the ink image formed on the recording medium to the recording medium, the ink includes a color material and a resin emulsion having an ionic group, and the treatment liquid is in contact with the ink. The image forming apparatus is characterized in that a pH change is caused to cause an aggregation action on the color material and the resin emulsion having the ionic group, and the pH difference between the ink and the treatment liquid is 3 or more. The above-mentioned problem is solved. [Selection] Figure 1 |