Ilford has some good information on processing B&W film, for instance
http://www.ilford.com/html/us_english/pdf/Film%20Hobbyist.PDF
I particularly like the alternative washing method where you rinse the
film in the tank by changing the water just three times: Fill with water at
the processing temperature, invert five times, drain and refill, invert ten
times, drain and refill invert 20 times.
I have used a modified version of the procedure for many years. I add a
fourth rinse for luck and a final rinse in demineralized water with a wetting
agent added to prevent the calcium stains. Has worked perfectly, saved
tons of water and there is no worry about temperature changes.
Someone once made a thorough analysis of the method and posted the
report on the net. I forget where, but hte conclusion was that it works, but
it is important to drain the tank thoroughly.
Hope this is of some use,
Lars
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