PHOTOGRAPHIC MATERIAL SUITABLE FOR IN-FLIGHT PROCESSING.
Quarterly progress rept. no. 14, 15 Sep-15 Dec 66,
TECHNICAL OPERATIONS INC BURLINGTON MA
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Research was devoted to the search for emulsions of superior speed and resolution, in the Plus-X Reversal class hereafter referred to as PXR, that are amenable to ultrarapid monobath and web processing. Emulsion S-54 has a speed comparable to or just superior to that of PXR, but has a slightly lower resolution than that of PXR. Emulsion S-55 is of comparable sensitivity to S-54 and to PXR, but shows a low gamma and more extended range than other emulsions in this class. These new emulsions, S-54 and S-55, are of the half-ammonia stepped precipitation type. An earlier series of emulsions reported on in this quarter, S-50 to S-53, were of the double-jet type, similar to S-33 reported earlier. It was found that they could not be formulated with the desired high sensitivity therefore, double-jet preparation work was discontinued, and the half-ammonia stepped precipitation emulsions S-54 and S-55 were studied. Previous work indicated that sub-10 sec, web processing, without free liquids, does not appear to be obtainable with emulsions in the PXR speed class. In this quarter, a monobath OM-20W was used to web process PXR in 10 sec, using a wet-web mode, to provide film characteristics comparable to the control. A monobath OM-16W was also used to process emulsion S-54 in sub-10 sec, in the wet web mode, to good speed characteristics.
- Cartography and Aerial Photography