The number of trays of water needed to thoroughly wash film has slipped my mind. I do have a washer, but I've only a few sheets to develop this time 'round so I'm thinking that filling up the washer and running it would probably waste more water than the tray method.
Can anyone please tell me how many tray change-outs it takes to wash a sheet of film?
Thanks!
"I would feel more optimistic about a bright future for man if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority"---EB White
I built a small setup in the interest of saving water. With a small circulating pump, I'll do three 5 minute washes in a gallon of water each wash. That's for a Jobo reel with four 4x5 films maximum, a spool of 120 or two spools of 35mm.
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Five 1 minute rinses with constant agitation will do the job. This is one method proposed byIlford in times of limited water.
I just processed 4 rolls of 120, 2 rolls at a time fixed in T-5 then one rinse 800ml, then hypo clear (T-5 is not suppose to need a hypo clear, but for Tmax films I do) then 3 to 4 changes of water, 800ml of water for each change of water as the film is still on the reels and in the tank, 10min,20min, and 25minutes. Sheet film is about the same but Tmax films always need more washing to get that red dye out.. What I need is a small 4x5, 5x7 sheet film washer, but the nikor tank and reels are pretty effective for 120.
I agree - I shoot a lot of Tmax & 5 minutes isn't near enough in my experience. But 5 water changes sounds like excellent advice.
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I second following Ilford's water wise methods:
http://www.ilfordphoto.com/assets/20154231237291446.pdf
although I do 5 changes of the wash not 3... I wonder if they changed their recommendation at some point.
I use 6 changes of water and at least 10 min in each. I think time is just as important as number of water changes to allow maximum diffusion of chemical out of the emulsion.
John, I looked this up in 'The Negative':Originally Posted by John Kasaian
If water is in short supply, a series of repeated soakings in containers of fresh water can be efficient in removing hypo. The recommended procedure is to give at least one-half hour of continuous soakings, with agitation, changing water every five minutes.
Personally i do 9 fill/agitate/dump cycles followed by a final rinse with 1+200 Photoflo when developing in a Mod54/Paterson tank.
Has worked for me so far!
I have a continuous fill containers for 4x5 and medium format cassettes that flow over the top. I let it go for 30 minutes or so. I've never had a problem.
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