Photographic polyester support
AssigneeFuji Photo Film Co., Ltd.
InventorFumio Kawamoto
Life of this patent
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Abstract
A photographic polyester support is disclosed which hardly curls when heat-treated at a temperature of from 50.degree. 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 .mu.m or less, (2) Max-Min of 5 m length in the lengthwise direction (MD R value): 10 .mu.m or less, (3) the difference in thickness between the adjacent hill and hollow (MD fluctuation): 8 .mu.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 .mu.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.
Claims13
A photographic polyester support which has a thickness pattern having a TD R value, an MD R value, an MD fluctuation and a TD base line value as follows:
- (1) TD R value:
- 8 .mu.m or less
- (2) MD R value:
- 10 .mu.m or less
- (3) MD fluctuation:
- 8 .mu.m or less
- (4) TD base line value:
- 5 .mu.m or less.
Dependencies are inferred from the claim text.