Society of Motion Picture Engineers : incorporation and by-laws (1926)

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Panchromatic Negative Film— Jones & Crabtree 173 respondingly brighter dark room illumination there is always danger of accidentally fogging an emulsion in the brighter hght before the desensitizing solutions have had sufficient time to act. It is preferable to give a preliminary bath in the desensitizer in a separate room and then transfer the racks to the dark room rather than to add the desensitizer to the developer. Processing Solutions • f Any developer formula which is satisfactory for Super Speed or Par Speed negative film is suitable also for panchromatic film. The PAR SPEED CINE NEGATIVE. A. MQ 80] B. PYRO [^ = 0.80 IN glycinJ 5. 5 Ml N 10.8 MIN. 16.5 MIN . Fig. 26. 12345678 10 DEVELOPMENT TIME IN MINUTES. Time-gamma curves in different developers with motion picture Par Speed negative film. SUPER SPEED CINE NEGATIVE. A.MQ 80 B.PYRO C GLYCIN, 2345678 10 DEVELOPMENT TJME IN MINUTES. Fig. 27. Time-gamma curves in different developers with motion picture Super Speed negative film. behavior of panchromatic film during development is very similar to that of Super Speed negative film both as regards the rate of growth of image density and fog. For shorter times of development both Super Speed and panchromatic film give less contrast than Par Speed film but the limiting contrast obtainable with all three emulsions is about equal.