Patent ID: 7914108

Claim:
An image forming apparatus, comprising: a first treatment liquid deposition device which deposits a first treatment liquid onto a recording medium, the first treatment liquid containing a polymerization initiator and particles introducing electrorheological properties; an electric field application device which applies an electric field to the first treatment liquid having been deposited on the recording medium; a second treatment liquid deposition device which deposits a second treatment liquid onto the recording medium, the second treatment liquid containing a polymerization initiator and having no electrorheological properties; a recording medium type identification device which identifies a type of the recording medium; a treatment liquid selection control device which controls operation of the first treatment liquid deposition device and the second treatment liquid deposition device, in such a manner that one of the first treatment liquid and the second treatment liquid is selectively deposited onto the recording medium, in accordance with the type of the recording medium identified by the recording medium type identification device; an ink ejection device which ejects ink toward the recording medium on which the one of the first treatment liquid and the second treatment liquid has been deposited, the ink containing a coloring material and a radiation-curable polymerizable compound; and a radiation irradiation device which irradiates radiation to cure the ink having been deposited on the recording medium.