PHOTOGRAPHIC SUBSTRATE, ITS ADJUSTING METHOD, HEAT DEVELOPABLE PHOTOGRAPHIC SENSITIVE MATERIAL AND ITS PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a heat developable photosensitive material for plate making excellent in dimensional stability even at a high temperature in heat development, less liable to curl even when provided in a roll shape and suitable for multi-plate printing, a processing method for the photosensitive material, a photographic substrate constituting the photosensitive material and a method for adjusting the substrate. SOLUTION: A biaxially oriented photographic polyester substrate before coating with at least one photographic constituent layer is conveyed and heat- treated in the temperature range from (the glass transition temperature of the substrate) +100 deg.C to the glass transition temperature under 0.01-30 kg/cm2 tension for 0.5-60 min to adjust the photographic substrate.