Fujifilm Corporation

Teppei Yamamoto

Hiroshi Kawakami

Masao Ikoshi

Kaoru Tojo

The invention provides an ink composition containing at least: a water-soluble organic solvent; a pigment; water; and a nonionic polymer thickener. The content of the water-soluble organic solvent is from 5 weight % to 30 weight % relative to the total amount of the ink composition. The ratio of V/V, in which Vrepresents 25&#xb0; C. viscosity (mPa&#xb7;s) measured at a shear rate of 1.5&#xd7;10(s) and Vrepresents 25&#xb0; C. viscosity (mPa&#xb7;s) measured at a shear rate of 3.0&#xd7;10(s), is from 0.70 to 0.95. The invention further provides an image formation method including at least ejecting the ink composition onto an image recording medium using an image formation apparatus to form an image on the image recording medium.

Ink composition and image formation method

An inkjet recording method recording on an inkjet recording medium having an ink receiving layer containing at least inorganic microparticles, a water-soluble resin and a crosslinking agent, by ejecting (1) an inkjet ink containing at least a dye, water and a water-soluble organic solvent, wherein 50% by weight or more of the water-soluble organic solvent is a solvent which gives a swelling ratio of 3% or less for the water-soluble resin crosslinked by the crosslinking agent, using(2) an image forming apparatus equipped with an ink circulating apparatus including:

Growing community of inventors

Kanagawa, Japan

Teppei Yamamoto