| 摘要 |
PURPOSE:To provide an optical information recording and storing medium which has high reflectivity (20-30%) and high light absorptivity and is suitable for a reflection type by forming said medium into the construction having a thin film of a cyanine dye on a plastic base plate subjected to a treatment for making the base plate insoluble in a hydrocarbon halide solvent. CONSTITUTION:A storing medium consists of a plastic base plate 1 on which an undercoating layer 2 insoluble in hydrocarbon halide is provided and a thin film 3 of a cyanine dye is formed thereon. A plate of acrylic, polycarbonate, polystyrene, polyester or PVC is used for the plastic base plate. The treatment to make the plastic base plate insoluble in a hydrocarbon halide solvent is accomplished by any method of providing the film of a resin or glassy material insoluble in hydrocarbon halide on the plastic base plate or providing an inorg. transparent film on the plastic base plate or crosslinking the surface of the plastic base plate by radiation or electron ray irradiation to make the same insoluble in the solvent or using the transparent plastic base plate insoluble in hydrocarbon halide. |
