Photographic polyester support

Details Photographic polyester support Photographic polyester support

1993-08-13

1994-03-15

Brammer, Jack P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428409, 428480, 430525, 430533, G03C 176

Patent

active

052944735

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.

REFERENCES:
patent: 4141735 (1979-02-01), Schrader et al.
patent: 4645731 (1957-02-01), Bayless et al.

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