For older photographers only!!

Discussion in 'UK Photography' started by Michael J Davis, Sep 3, 2008.

  1. I was clearing out a cupboard the other day, and came across an ancient
    bottle of "Paterson Cleaning Solution" (for darkroom dishes etc.) I see
    it cost 3/6 !

    The label is extremely faded, but can anyone tell me what the active
    ingredient is? My normally sensitive nose is unable to detect any
    aggressive agent.

    Thanks

    Mike

    --
    Michael J Davis
    <><
    "I never have taken a picture I've intended.
    They're always better or worse."
    Diane Arbus
    <><
     
    Michael J Davis, Sep 3, 2008
    #1
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  2. Michael J Davis

    Geoff Berrow Guest


    Cleaning Solution? My dishes used to get a quick rinse and that was it.
    I'd have thought you'd need some kind of bleach to remove fixer stains.

    Evil stuff, fixer. A clear solution, the stain did not appear until
    much later when it was too late.
     
    Geoff Berrow, Sep 3, 2008
    #2
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  3. Michael J Davis

    Adam Funk Guest

    With a terminus ante quem of 1972, that stuff may not have any
    *active* ingredients now.


    The photography chapter of _Formulas, Methods, Tips and Data for Home
    and Workshop_ (Swezey, 1969) doesn't mention that (it's an American
    book and I suspect you have a British brand-name product) but it does
    have a recipe for

    Tray Cleaner

    ... Do not spill it on your skin, clothing, or surroundings, as it
    is corrosive.

    Water 32 oz
    Potassium dichromate 3 oz
    Sulfuric acid, concentrated 3 oz

    This book says you should use a lot of water after pouring this stuff
    down the sink, or "Better still, flush it down the toilet." (Note: I
    think H&S rules have changed over the past four decades.)

    It also has a "Two-Solution Tray Cleaner and Hand Stain Remover" that
    uses permanganate instead of dichromate, and some other gubbins, as
    well as (surprise) much less sulfuric acid.
     
    Adam Funk, Sep 6, 2008
    #3
  4. Hi Adam!

    Yes, that sounds reasonable. I was assuming that!
    Certainly potassium dichromate rings a bell, in a weak acid solution. (I
    think I've had some that was in acetic acid, too. So I think that's
    about right.
    Interesting. I guess it was to dissolve the silver deposits in the dish.

    Most helpful

    Mike

    --
    Michael J Davis

    Now with added pictures on http://www.flickr.com/photos/watchman

    <><
    The camera is an instrument that teaches people how to see without a camera.
    Dorethea Lange
    <><
     
    Michael J Davis, Sep 7, 2008
    #4
  5. Michael J Davis

    Adam Funk Guest

    I still wouldn't drink it.

    I think the "Tray Cleaner" and the "Hand Stain Remover" in the book
    are both for remove silver deposits, but don't get them mixed up!
     
    Adam Funk, Sep 8, 2008
    #5
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