Patent ID: 7316473

Claim:
An inkjet recording method comprising the step of: forming a color image with color inks and an invisible ink onto a recording medium by while scanning a first recording head multiple times on a same recording area of the recording medium, forming a thinned-out image according to an thinning-out pattern without regularity in each scanning, the first recording head having a plurality of nozzle sections for jetting color inks, and jetting an invisible ink from a second recording head in accordance with an adhering amount of the color inks per unit area on the recording medium, wherein a nozzle pitch of the first recording head is from 10 to 50 μm, the color inks comprise cyan, magenta, yellow and black inks and at least one special color ink, the color inks contain pigments, at least one organic solvent with high boiling point and water, a dot formed by jetting the color inks with the first recording head has a size of 10 to 50 μm on the recording medium, the invisible ink contains water, at least one organic solvent with high boiling point and a resin fine particle, and the recording medium has a transferred amount at 0.04 seconds of absorption time by Bristow method of 10 ml/m 2 or more, a micro-porous layer containing inorganic fine particles having a mean particle size of 15 to 100 nm and a hydrophilic binder.