(5) The developer and fixer solution should be returned to their respective
bottles promptly after use pr discarded because of aerial oxidation of the developer
solution and dust and other foreign matter collecting in uncovered trays.
4-19. RAPID PROCESSING OF SURGICAL RADIOGRAPHIC
a. General. Occasionally during surgical procedures, it is necessary for the
surgeon or radiologist to view radiographs at the earliest possible moment. In such
situations, normal processing time can be reduced by several minutes by adding
sodium hydroxide to the developer solution according to the following formula:
SPECIAL RAPID PROCESSING DEVELOPER
Desiccated sodium sulfate
Sodium hydroxide (caustic soda)
Water to make
The chemical should be dissolved in the order listed.
(1) Two parts of stock solution are mixed with one part water, and the x-ray
film is developed in it for about 60 seconds at 68F. The development time may be
reduced to 45 seconds by decreasing to one ounce the potassium bromide in the above
formula. However, appreciable fog may result. The tray method of processing is
preferred because the keeping quality of the developer is poor when diluted as
recommended above. The solution should be discarded after it has been used. The
stock solution, however, will retain its properties for about two months if kept in a well-
stoppered brown bottle.
(2) Since caustic soda is one of the components of the developer, dental x-
ray film clips should be used for handling the films to protect the hands. It is important
that the films be rinsed well following development before being placed in the fixer. This
step is necessary to prevent the formation of stains or diachronic fog.
(3) If fresh fixer solution is used, the radiograph should be ready for viewing
after having been immersed, with frequent agitation, for approximately 10 minutes to
ensure thorough hardening of the emulsion. It may then be washed in the usual