<p>A method which comprises performing ink-jet recording with a water-base ink obtained by dissolving in water an alkali metal salt of a leucosulfuric ester which is a quinone-type insoluble organic dye, and then giving light energy to the ink dots formed on the receiving material to change the dye into an insoluble dye. Thus, the durability (resistances to light, water, and heat) of the applied ink can be improved to the same level as that for printing inks applied with plates.</p>
