Patent ID: 7906186
Filing Date: 2011-03-15
Classification: B41M

Abstract:
1. An ink jet recording medium comprising a substrate and at least one ink-receiving layer on the substrate, wherein said ink-receiving layer after recording has the characteristic that the sum of image clarity values is 130 or more (when measured by optical combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm and 2.0 mm) and the regular reflection strength is 30 or more, wherein: the center average roughness SRa of said substrate at least on the side on which said ink-receiving layer is formed is 0.70 μm or less when measured in the condition of a cutoff of 0.05 to 0.5 mm, and is 0.80 μm or less when measured in the condition of a cutoff of 1 to 3 mm, and the ink-receiving layer comprises a dispersion of inorganic microparticles, and the average primary particle diameter of the inorganic microparticles is 30 nm or less and the secondary particle diameter of the inorganic microparticles is 200 nm or less.