In the second ink, the most preferable aqueous medium is composed of water and at least one organic solvent, where the organic solvent is at least one water-soluble organic solvent with a high boiling point as exemplified by polyhydric alcohols such as diethylene glycol, triethylene glycol, glycerol, 1,2,6-hexanetriol and thiodiglycol, and 2-pyrrolidone.