Product: ORWO DP31 Gauge: 35mm Length: 100 ft Base: Polyester Base Perforation: BH (Bell and Howell) Time Code/Edge Numbers: K-Code (Kodak Key Code) Product description: ORWO DP31 (duplicating positive film) is a low-speed duplicating film for making master positives from black and white camera negatives. It has panchromatic sensitivity. It produces well-balanced grey scales, fine grain and excellent resolving power. In addition, there is an AHU-Layer (Anti Halation Under-Layer) between the emulsion layer and the clear base which will be uncolored during the processing. Compare To: Eastman Fine Grain Duplicating Positive Film 2366/3366 not panchromatic Still photographers results may vary