Image forming method, and set of ink compositions and image forming apparatus, which are applicable to the image forming method

摘要

In an image forming method in which at least two kinds of ink compositions are applied onto a recording medium to form an image on the recording medium, the image forming method has the steps of providing a first ink composition containing a solvent, a coloring material and a block polymer having at least an anionic block segment for dispersing the pigment in the solvent, and a second ink composition containing a solvent, a dye and a polyvalent metal ion having reactivity with the block polymer; and applying the first ink composition and the second ink composition onto the recording medium to bring the first ink composition into contact with the second ink composition.