Patent ID: 9517635
Filing Date: 2016-12-13
CPC Classification: B41J,C09D

Claim Text:
1. An image forming method comprising: applying a treatment liquid, which contains an organic acidic compound represented by the following general formula (I), a water-soluble polymer compound, and water, on a recording medium; and applying an ink composition, which contains a pigment, a compound having a lactam structure of 5-membered ring, a compound represented by the following general formula (II), and water, on a treatment liquid-applied surface of the recording medium, wherein in the general formula (I), n represents an integer of 2 or greater and m represents an integer of 3 or greater, wherein in the general formula (II), 1, m, and n each independently represent an integer of 1 or greater, the relation l+m+n=3 to 15 is satisfied, and AO represents at least one of ethyleneoxy and propyleneoxy, and wherein the water-soluble polymer compound contains a hydrophilic structural unit having an anionic group.