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Thread: QUICK! HELP

  1. #1
    RAP
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    How do I make up a 10% solution of potasium bromide from a powder? Is it 1 gram/100ml water?
    Time & tides wait for no one, especially photographers.

  2. #2
    Jorge Oliveira's Avatar
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    No, 10g/100ml water.

    Since 1ml water=1g, 1g/100ml would be 1%.

    Jorge O

  3. #3
    RAP
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    GOD BLESS PHOTOGRAPHER"S FORMULARY! THEY HAD THE ANSWER!

    10 grams/100ml!
    Time & tides wait for no one, especially photographers.

  4. #4
    RAP
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    THANKS JORGE!
    Time & tides wait for no one, especially photographers.

  5. #5
    RAP
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    The reason I was so anxious this afternoon was that I had run out of benzotriazole and the only thing I had as a substitute was potassium bromide, KBr. But I had forgotten what the ratio was for a simple 10% solution. WHAT A DUMMY!

    I called Kodak and suffice it to say, they were no help. The rep has not called with the answer as he said he would. He questioned me where I heard of KBr and I said that AA's "The Print" had it listed as an anitfog chemical. He said, "why don't I ask him?" I said that I do not talk with the dead.

    I called Calumet and they said they had discontinued the Zone VI bottled benzotriazole, because of the proliferation of the "D" word.

    So I called Photographer's Formulary. The girl who answered, the receptionist, knew the answer! Maybe she wasn't the receptionist but I was very very impressed! She had it right on the tip of her tongue.

    Suffice it to say, I am a Photographer's Formulary customer from now on!

    BTW, they do sell powdered benzotriazole.
    Time & tides wait for no one, especially photographers.

  6. #6
    David A. Goldfarb's Avatar
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    The Kodak response is brilliant.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  7. #7
    Jorge Oliveira's Avatar
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    I've been using benzotriazole in place of Kbr for decades.
    Does any one remembers Kodak Anti Fog n. 1 in pills?

    man, I'm THAT old!

    Jorge O

  8. #8
    RAP
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    Apparently so am I. I remember the Kodak pills from 20 years ago. I had some but never used them and ended up throwing them away. I used the Zone VI for years but now Calumet discontinued it.
    Time & tides wait for no one, especially photographers.

  9. #9
    David A. Goldfarb's Avatar
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    I remember those pills, too, but I never used them myself. I've been using Edwal Liquid Orthazite lately as a restrainer, which is a solution of benzotriazole and sodium sulfite.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  10. #10
    Aggie's Avatar
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