Patent ID: 9034427
Filing Date: 2015-05-19
Classification: B41J,C09D,Y10T

Abstract:
1. A method of forming a composite layer comprising: forming a first layer by discharging droplets of an ink composition containing a single pigment consisting of aluminum or aluminum alloy to a record medium by an ink-jet recording process; forming a second layer by discharging droplets of an ink composition containing a single pigment consisting of white metal oxide particles to the record medium by an ink-jet recording process; recording an image to the composite layer by an ink-jet recording process; and heating the record medium during at least forming the first layer and forming the second layer; wherein an average particle diameter of the metal oxide particles is 0.05 to 0.8 μm; the aluminum or aluminum alloy pigment comprises plate-like particles, wherein when a major axis and a minor axis of flat surfaces of the plate-like particles are defined as X and Y respectively and a thickness of the particles is defined as Z, then a 50% average particle diameter of R50 based on circle-equivalent diameters determined form an X-Y plane area of the plate-like particles satisfies a condition: R50/Z>5, and R50 is in the range of 0.5 to 3 μm; and a thickness of the first layer is 0.01 to 10 μm, and a thickness of the second layer is 0.1 to 10 μm; and wherein an absolute value of difference (ΔL*) is not more than 1.5 according to the following expression: ΔL*=(L1*value of a sample placed on a white medium (L*=93.6))−(L2*value of a sample placed on a black medium (L*=4.6)); and wherein the sample(s) are formed by forming the first layer on the second layer on a surface of the record medium; and wherein the second layer L2* value is not more than 49.8.