| 摘要 |
The image forming method forms an image on a medium by using ink and treatment liquid. The ink contains coloring material and thermoplastic resin particles in a solvent, and the treatment liquid contains a component which aggregates the coloring material. The image forming method includes: a treatment liquid deposition step of depositing the treatment liquid onto the medium to form a treatment liquid film on the medium; an ink droplet deposition step of ejecting and depositing droplets of the ink onto the medium to form an ink film on the medium on which the treatment liquid film has been formed; and an ink film drying step of heating and drying the ink film under conditions where T<MFT+20° C. until alpha declines to a state not higher than 2.0 from a state exceeding 2.0, where T is a surface temperature of the ink film, MFT is a minimum film forming temperature of the thermoplastic resin particles, and a is a solvent content rate of the ink film formed on the medium in the ink droplet deposition step defined as a volume of the solvent per unit surface area in the ink film divided by a volume of solid material per unit surface area in the ink film.
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