Patent ID: 8608304
Filing Date: 2013-12-17
Classification: B41J,B41M

Abstract:
1. A process for forming an image by using an inkjet recording apparatus using two or more kinds of inks each containing a pigment dispersion containing a pigment and a resin, an organic solvent and water comprising: step of plotting values of the average particle diameters of the pigment contained in the ink on an XY plane comprising an X axis relating to the mass drying rates (%) in a range of 10 to 40% and a Y axis relating to the average particle diameters (μm) of the pigment; step of obtaining a particle size-change constant as the gradient of an approximate straight line obtained by linear-approximating the plotted values; step of filling the two or more types of inks, into two or more recording heads arranged facing a recording medium that is conveyed inside of the inkjet recording apparatus and in parallel in a conveying direction of the recording medium, so that a particle size-change constant of ink filled into a recording head is larger for a recording head positioned more on a downstream side in the conveying direction of the recording medium; and step of forming an image by ejecting the two or more types of the inks from the two or more recording heads towards the recording medium; wherein each ink has a particle size-change constant of 50 μm/% to 150 μm/%.