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February, 1934
The INTERNATIONAL P II 0 T O G R A P H E R
Nine
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TANK. BOTTOM
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HOLLYWOOD, CALIFORNIA
DECEMBER 21ST. lOJi
Portable, Temperature Controled
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FIGURE 12
customed to them they can he relied upon to hold the out as desired.
film perfectly. There are other systems and methods Now if we really want to use an old trick of the
which might he adaptable to this tank system. a _trade, after the running water has done all of this work
Regardless of the make, it is necessary to r^ng tne" /'an3~ it *etjs under 70 degrees, we can build a pre-cooler
film and the rack to the same temperature as tne MP ' wjiich bringsCrthe tap water within about two degrees
veloper, otherwise streaks are sure to give you grieffSTjhe of the refuse ^vateoBoillowing the waste water to cir
film and the rack always take on the temperattire^of /the culate around 'tHe^n^Uce pipe, which requires 98 feet of
room, then when they are immersed in the developer, ]/? , inch p-?pV(pef gallrmTityy'circulation. It takes a lot
development is accelerated or retarded where the rack touches the film; hence, place the rack and the film in the cooling chamber as the first step and so on through the process.
Figures 7 and 8 show an accessory, kept at a constant temperature by the waste water from the rinse, which is still righl 'around 66 degrees. Someoperators would rather carry a 'little, concentrated solution for a booster. This can be kept Th-aQ)ot'tle--in Kt-comer_of one of the square tanks. A.
Figures 12 and 13 show another accessory. Some operators like the carbonate bath and some the chrome alum bath. This illustrates how it mav be added or left
of pipe, but/ some feop"te want it. Personally, I don't recommend it, T)ec4jjlse^ c-f clogging and the trouble it causes when it has been used a while.
Another trick that can be used is, for instance: The tap water has only to be raised or lowered ten degrees or less, so why not increase the water flow to 90 gallons an hour and get the benefit of faster washing for positive? However, with a simple wire rack, two Stineman reels can wash, one on top of the other in the same tank. In closing, I wish to thank W. L. Holladay, Refrigeration Engineer for the General Electric Company, and Percy Millard, Laboratory Expert, for their criticism and suggestions.
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