Patent ID: 7736725

Claim:
An information recording medium comprising a core substrate sheet for a card and a laminate layer bonded to at least one surface of the core substrate sheet for a card, a toner image being formed on a surface of the laminate layer at the core substrate sheet for a card side thereof, wherein the information recording medium is produced at least through a lamination process of laminating the surface of the laminate layer of an image-recorded medium and the at least one surface of the core substrate sheet for a card by heat pressure bonding, wherein the image-recorded medium comprises a substrate, the laminate layer formed on one surface of the substrate, and a non-laminate layer formed on the other surface of the substrate, the toner image being formed on the surface of the laminate layer by use of an electrophotographic method, and wherein the non-laminate layer contains at least a resin and fine particles and satisfies the following inequalities (5) to (7): 1.5≦R≦5; inequality (5) 0.1≦t<R; and inequality (6) 7 /R≦n, inequality (7) wherein R represents a volume average particle diameter (μm) of the fine particles; t represents a thickness (μm) of the non-laminate layer; and n represents the number of the fine particles contained in the non-laminate layer per 10,000 square μm in the substrate plane direction (particles/(100 μm) 2 ).