. Elementary and dental radiography . of formula^ for the developers used by twelve different Developer. radiographers, and they were all different! From this we may conclude that any clean, properly mixed developer will do the work. The writer uses a prepared developer which may be purchased at MAKING DENTAL RADIOGRAPHS 103 almost any photographic supply store, the Eastman M. O. developer, theformula for which is given in Chapter IV. This developer is sold fordeveloping photographic paper, but it develops films and plates lahel on the tube containing the chemicals directs that t
. Elementary and dental radiography . of formula^ for the developers used by twelve different Developer. radiographers, and they were all different! From this we may conclude that any clean, properly mixed developer will do the work. The writer uses a prepared developer which may be purchased at MAKING DENTAL RADIOGRAPHS 103 almost any photographic supply store, the Eastman M. O. developer, theformula for which is given in Chapter IV. This developer is sold fordeveloping photographic paper, but it develops films and plates lahel on the tube containing the chemicals directs that they be mixedwith 4 ozs. of water for one kind of photographic paper, Regular Ve-1\. and 8 ozs. for two others, Azo and Special Yelox. 1 use 6 water. After the powder is dissolved in the water in my graduate Iput 3 ozs. of the solution in the tray for immediate use and 3 ozs. in a3-oz. amber glass bottle. In this bottle, tightly corked, the developerwill keep as long as a month. Even if it does discolor slightly it can. Fig. 94. Films hung up to dry still be used for negatives, though it might stain paper. When the nega-tives are developed—one or many may be developed—the developer inthe tray is thrown away. I never try to save developer that has beenused, with the idea of using it again in the future. Since writing the foregoing I have been using another prepared de-veloper, rodinal. My limited experience with it teaches me to believe thatit is as good as the M. O. developer. My chief reason for using it, how-ever, is because it is so extremely convenient to handle. It is a I wish to develop a film I take 2^/2 ozs. of tap water to 2 dramsof rodinal. This makes a 1-10 solution. The water and the rodinalare simply placed in the tray together, and the developer is ready foruse; one does not need to wait for powders to dissolve. When conditions and length of exposure are as given above, the timethe film remains in the developer is usually about 5 minutes; the
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