Patent ID: 7303651

Claim:
Ink jet printing paper, comprising: a low permeability or nonpermeable supporting sheet; at least one ink receiving layer coated on said supporting sheet; and a luster layer coated on said ink receiving layer, wherein said luster layer comprises a pigment as a main component having an average primary particle size of 5 to 100 nm, wherein said ink receiving layer in contact with said luster layer comprises a pigment, as a main component, having a specific surface area-based mode diameter of pore distribution of 100 nm or less and an average secondary particle size of 1.3 μm or less, wherein said ink receiving layer has a porosity of less than 80% but greater than 45% and said luster layer has a porosity of 45% or less but greater than 10%, and wherein the difference between the porosity of the ink receiving layer and the porosity of the luster layer is greater than 25%.