Abstract: A first information recording medium according to the present invention includes a substrate and an ink receiving layer disposed on one main face of the substrate. The water contact angle of the surface of the ink receiving layer is at least 85° and at most 110°. The surface of the ink receiving layer is provided with protrusions with a height of at least 4 ?m. The number of the protrusions is at least 20 pcs/mm2 and at most 100 pcs/mm2. Furthermore, in a second information recording medium according to the present invention, the ink receiving layer contains particles with a particle size of at least 20 ?m. The particles include particles that are exposed partially on the surface of the ink receiving layer. The number of these particles is at least 75 pcs/mm2 and at most 250 pcs/mm2.

Abstract: The surface layer of a receptive layer has a water-absorbing property, and when the surface layer of the receptive layer is glossy and a layer to be printed covers up to a clamp area, the medium has a high possibility of causing a sticking of the receptive layer to a chucking mechanism in a drive. For this reason, an optical disk has been demanded which does not cause the peeling of the receptive layer in the clamp area while being used as the medium, provides a clear printed image, and copes with a high-resolution wide printing. In order to make the surface of the receptive layer not stick to the chucking mechanism of the drive, it is necessary to roughen the surface, but when a colored fine particle is contained in the receptive layer, a printed image on the receptive layer becomes unclear.