Image forming method

An image forming method, comprising:

• applying a pretreatment liquid on the surface of a recording medium;
• and
• applying an inkjet ink comprising a colorant, a hydrosoluble organic solvent, a surfactant and water on the surface applied with the pretreatment liquid,
• wherein the hydrosoluble organic solvent comprises:
• at least one polyol comprising an equilibrium water content in an amount not less than 30% by weight at 23° C. and 80% RH;
• an amide compound having the following formula (I);
• and
• at least one of compounds having the following formulae (II) to (IV),
• wherein R represents an alkyl group having 4 to 6 carbon atoms,
• wherein R1 represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and R2 represents an alkyl group having 1 to 4 carbon atoms,
• wherein R′ represents an alkyl group having 1 to 2 carbon atoms;
• and R3 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cyclic alkyl groups or an aromatic ring, and
• wherein R4 and R5 represent an alkyl group having 1 to 8 carbon atoms, respectively, and
• wherein a pure water transfers to the recording medium in an amount of from 1 to 15 mL/m2 when measured by a dynamic scanning liquid absorptometer at a contact time of 100 ms.