Patent ID: 8220915

Claim:
An image forming method comprising the steps of: depositing an aggregating treatment liquid onto a recording medium; depositing an ink containing 10% or more and less than 30% of a water-soluble high-boiling-point organic solvent having an SP value of 28 (MPa) 1/2 or lower, onto the recording medium in accordance with an image signal, a viscosity at 25° C. of a 30% aqueous solution of the water-soluble high-boiling-point organic solvent being 5 cP or lower; removing water contained in the solvent of the ink on the recording medium, by a heating drying device; heating and pressurizing the ink so as to fix the ink onto the recording medium; and rendering the aggregating treatment liquid to a solid or semi-solid state after the step of depositing the aggregating treatment liquid onto the recording medium and before the step of depositing the ink onto the recording medium.