Information recording medium comprising a silver nalide light sensitive layer, and two superposed magnetic layers which differ in coercivity

Claim 1

An information recording medium for use in a camera comprising an image forming system and at least one magnetic recording head, said medium comprising; a base having a first surface and a second surface, at least one silver halide light-sensitive layer being provided on said first surface; and at least two magnetic layers comprising iron-containing ferromagnetic powder and a binder being provided on said second surface, a coating amount of ferromagnetic powder in each of said at least two magnetic layers being 10 mg or less per 100 cm 2 , based on iron weight, said ferromagnetic powder being a material selected from the group consisting of γ-Fe 2 O 3 , Co-coated γ-Fe 2 O 3 , Co-coated Fe 3 O 4 , Co-coated FeOX wherein 4/3<X<3/2, other iron oxides containing Co, and hexagonal ferrite magnetic powders, including Ba ferrite, Sr ferrite, Pb ferrite, and M-type and W-type Ca ferrite, said at least two magnetic layers including an outermost magnetic layer having a coercive force of 600 to 2000 Oersteds, and at least one inner magnetic layer having a coercive force of 200 to 800 Oersteds, the coercive force of said outermost layer being at least 100 Oersteds more than that of said inner layer, said outermost magnetic layer being adapted to receive information from said recording head of said camera, said inner magnetic layer being provided with film processing and printing information, said inner magnetic layer being adapted to allow erasure of information stored thereon more easily than information on said outermost magnetic layer, whereby, after processing, information on said inner magnetic layer can be erased, while information on said outermost magnetic layer is retained.