| 摘要 |
A photographic polyester support is disclosed which hardly curls when heat-treated at a temperature of from 50 degrees C. to the glass transition temperature thereof in the form of a bulk roll, its thickness pattern satisfying the conditions of (1) Max-Min in the whole widthwise direction (TD R value): 8 (my)m or less, (2) Max-Min of 5 m length in the lengthwise direction (MD R value): 10 (my)m or less, (3) the difference in thickness between the adjacent hill and hollow (MD fluctuation): 8 (my)m or less, and (4) the maximum value of hills above a base line of the average thickness of both ends (TD base line value): 5 (my)m or less. The surface flatness of the heat-treated support is good. When the support is coated with photographic emulsions, the surface of the coated photographic material is even.
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