Mixing Sodium Citrate for PT/PD

Discussion in 'Alternative Processes' started by Richard Boutwell, Jan 9, 2009.

  1. Richard Boutwell

    Richard Boutwell Subscriber

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    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.
     
  2. Richard Boutwell

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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)?
     
  3. Blunt

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

    Wm Blunt
     
  4. Richard Boutwell

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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.
     
  5. Blunt

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    I did fail algebra:sad: but I found another book that states 500 grams to 1.5 liters water so you do the math.........sorry.
     
  6. Blunt

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    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. Richard Boutwell

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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.
     
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  8. Andrew O'Neill

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    So, how do you make sodium citrate? How much citric acid and sodium carbonate?
     
  9. Richard Boutwell

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    Try Here: http://tinyurl.com/9k5y85