| 摘要 |
PURPOSE:To improve the lightfastness and feeling of an image by providing a photosensitive diazo layer contg. pulverized particles of a PE or PP on a surface layer which is pretreated with a modified PVA and providing a back coat layer on the rear surface of a base. CONSTITUTION:The pulverized particles of the PE or PP are incorporated into the photosensitive layer and the back coat layer contg. at least one kind of the PVA, PVA modified by a sodium allyl sulfonate or acrylate is provided on the rear of the base, by which the balance of the hygroscopicity between the front and rear of the base is adjusted and the curling thereof is prevented. The PVA to be used for the back coat layer is exemplified by a PVA having 45-99% degree of saponification. The lightfastness and feeling of the image are thereby improved. |
