Patent ID: 6670000
Filing Date: 2003-12-30
Classification: B41M

Abstract:
A recording medium comprising a porous outermost layer on a substrate, an ink-receiving layer being provided between said substrate and said outermost layer, said ink-receiving layer comprising at least as much pigment as any other component by weight, and being porous, said porous outermost layer containing a particulate thermoplastic resin, said particulate thermoplastic resin exhibiting a &Dgr;E value of not higher than 20 after light exposure,wherein &Dgr;E is an index of the degree of photo-deterioration of a resin, expressed in color difference caused by light exposure, and is calculated on the basis of JIS Z 8730 according to the equation below: &Dgr;E=[(Lâˆ’L0)2+(aâˆ’a0)2+(bâˆ’b0)2]Â½where L and L0 are levels of the lightness; a and a0 are levels of the hue; b and b0 are levels of the saturation; L0, a0, and b0 are measured values before the light exposure; and L, a and b are measured values after a 200-hour exposure; andwherein the difference of glass transition temperature of said particulate thermoplastic resin from minimum film-forming temperature thereof is not less than 10Â° C., and the minimum film-forming temperature is not lower than 50Â° C., wherein said particulate thermoplastic resin comprises latex particles comprised of a copolymer formed from three or more monomers of vinyl chloride-vinyl acetate-acrylate, and wherein particles of said particulate thermoplastic resin are partially fusion-bonded together.