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  1. #1
    Matthew Thompson's Avatar
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    Rainwater for darkroom supply

    Is anyone using rainwater to supply a darkroom?

    I've got a great outbuilding that would be fine for a darkroom, but water isn't part of the picture. It's a detached garage with half finished as office space.

    It would be easy to run gutters off the roof and collect in a 200Gal industrial potable tank (lots available via surplus suppliers), then plumb the supply from there. Filtering the water would be a must, but does anyone have direct experience collecting water for darkroom use? Has it worked out for you?

  2. #2

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    very good

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    How would acid rain affect this? Would the degree of acidity be irrelevant for photographic purposes?
    Charles Hohenstein

  4. #4

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    i'd put it through a filter ... and use clean water for your final rinse ...

  5. #5
    DCV
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    I would suggest you process a roll of unexposed film with it to see if any contaminants might give increase the film base fog or cause any other problems. I had a friend many years ago who got increased base fog because of excessive salt levels in the municipal water supply. Otherwise, have fun!

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    It should be fine, especially for washing. Are you going to try the gravity fed method or a pump of some sort?
    --Nicholas Andre

  7. #7
    Matthew Thompson's Avatar
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    I'd think with a 200Gal tank off the ground a few feet Gravity should do the trick. It's not like there's a bunch of pressure required.

    I'd filter the water for sure, as it would be coming over shingles, gutters and eventually into the tank. Probably a fine mesh sieve before the tank then a inline filter before the faucet. Temperature would be pretty easy to work around since the tank would be inside and that much water would be stable/heat sink.

  8. #8
    Rick A's Avatar
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    In the Southwestern states people collect rain water for cullinary purposes. Sediment filter and a uV filter for biological impurities(microbes and mold spores, etc.) and you're all set to go.
    Rick A
    Argentum aevum
    BTW: the big kid in my avatar is my hero, my son, who proudly serves us in the Navy. "SALUTE"

  9. #9
    largeformat pat's Avatar
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    If you are using those clear tanks, you must paint them.After a while with warmer weather you get an algae bloom inside. Reduce the light to the water and also protect the plastic from UV.
    Pat.
    What grain............................................. ...............
    Oh sorry, I forgot you don't shoot Large Format
    Large format Pat.

    http://www.largeformatpat.com

  10. #10

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    My concern would be whether you could use a fine enough filter without needing more pressure than gravity will provide. You may want to experiment with this. And I would leave room in the tank for sediment to precipitate out.
    "Far more critical than what we know or do not know is what we do not want to know." - Eric Hoffer

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