| 摘要 |
1314085 Polyester film base EASTMAN KODAK CO 30 April 1970 [5 May 1969] 20858/70 Heading G2C [Also in Division C3j A neutrally coloured polyester substrate for a photographic film is obtained by blending a linear polyester with a suitable azabenzanthrone dye (see Division C3),e.g. 2, 3-dihydro-3-methyl- 2-oxo-6-p-toluidino-3-azabenzanthrone, together with the green dye, 1, 4-dihydroxy-5, 8-di-p-toluidino-anthraquinone, and melting and extruding the blend. The substrate may carry a silver halide emulsion layer and may be biaxially orientated. |
