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  1. #1
    Richard Boutwell's Avatar
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    Mixing Sodium Citrate for PT/PD

    I need to mix more sodium citrate for developing platinum/palladium prints. In doing a search I have found how to make it from citric acid and sodium carbonate, but I already have dry sodium citrate. I vaguely recall 300mg per liter of water, but can't be sure of that. Any help would be appreciated.
    ". . . photographing as a two-way act of respect. Respect for the medium and letting it do what it does best- describe. And respect for the subject in describing it as it is. A photograph must be responsible to both."-- Garry Winogrand

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    Richard Boutwell's Avatar
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    I think I found it. Can anyone confirm that it is in fact 453.59g of sodium citrate to 710ml of Water (1 pound sodium citrate to 24 oz. of water)?
    ". . . photographing as a two-way act of respect. Respect for the medium and letting it do what it does best- describe. And respect for the subject in describing it as it is. A photograph must be responsible to both."-- Garry Winogrand

    "Art is just a Series of Natural Gestures."-- John Marin

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  3. #3

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    300 grams to one quart according to The New Platinum Print by Weese and Sullivan.

    Wm Blunt

  4. #4
    Richard Boutwell's Avatar
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    It has been ten years since I nearly failed algebra but I am fairly sure about the math; isn't 300g per 32 fl. oz. about half as strong as 16 oz per 24 fl. oz?

    300g/946ml*2= 6.34249
    and
    453.59/709.56=6.39255

    So I should just dilute it 1:1 if I were impatient and mixed 1 pound to 24 fl.oz.?

    I have only been printing platinum/palladium for a few months. Does anyone know the affect of using a too strong developer? If not then I will try it and see before I go diluting my solution.
    ". . . photographing as a two-way act of respect. Respect for the medium and letting it do what it does best- describe. And respect for the subject in describing it as it is. A photograph must be responsible to both."-- Garry Winogrand

    "Art is just a Series of Natural Gestures."-- John Marin

    My Platinum Printing Blog

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  5. #5

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    Quote Originally Posted by Richard Boutwell View Post
    It has been ten years since I nearly failed algebra but I am fairly sure about the math; isn't 300g per 32 fl. oz. about half as strong as 16 oz per 24 fl. oz?

    300g/946ml*2= 6.34249
    and
    453.59/709.56=6.39255

    So I should just dilute it 1:1 if I were impatient and mixed 1 pound to 24 fl.oz.?

    I have only been printing platinum/palladium for a few months. Does anyone know the affect of using a too strong developer? If not then I will try it and see before I go diluting my solution.
    I did fail algebra but I found another book that states 500 grams to 1.5 liters water so you do the math.........sorry.

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    Quote Originally Posted by Richard Boutwell View Post
    It has been ten years since I nearly failed algebra but I am fairly sure about the math; isn't 300g per 32 fl. oz. about half as strong as 16 oz per 24 fl. oz?

    300g/946ml*2= 6.34249
    and
    453.59/709.56=6.39255

    So I should just dilute it 1:1 if I were impatient and mixed 1 pound to 24 fl.oz.?

    I have only been printing platinum/palladium for a few months. Does anyone know the affect of using a too strong developer? If not then I will try it and see before I go diluting my solution.
    Either 300 grams to 32 oz. or to one liter won't make any difference i doubt. The print will develope in a few seconds and the rest of the time in the developer will help clear the print easier.

  7. #7
    Richard Boutwell's Avatar
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    500g:1500ml is basically the same as 300g:946ml, which means the solution I mixed earlier is still about twice as strong as it should be.

    Though, I DID end up with a total 32 oz of solution after it was mixed.
    Last edited by Richard Boutwell; 01-09-2009 at 04:32 PM. Click to view previous post history.
    ". . . photographing as a two-way act of respect. Respect for the medium and letting it do what it does best- describe. And respect for the subject in describing it as it is. A photograph must be responsible to both."-- Garry Winogrand

    "Art is just a Series of Natural Gestures."-- John Marin

    My Platinum Printing Blog

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  8. #8
    Andrew O'Neill's Avatar
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    So, how do you make sodium citrate? How much citric acid and sodium carbonate?

  9. #9
    Richard Boutwell's Avatar
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    Quote Originally Posted by Andrew O'Neill View Post
    So, how do you make sodium citrate? How much citric acid and sodium carbonate?
    Try Here: http://tinyurl.com/9k5y85
    ". . . photographing as a two-way act of respect. Respect for the medium and letting it do what it does best- describe. And respect for the subject in describing it as it is. A photograph must be responsible to both."-- Garry Winogrand

    "Art is just a Series of Natural Gestures."-- John Marin

    My Platinum Printing Blog

    My WEBSITE



 

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