Paterson Acugrade FX-31 dev - formula?

Discussion in 'B&W: Film, Paper, Chemistry' started by Sim2, Jan 4, 2014.

  1. Sim2

    Sim2 Member

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    Hallo there,
    A longshot this one but worth a try!
    Does anyone know if the formula for the old (discontinued) Paterson Acugrade FX-31 developer is known? If so, where can it be found?

    I do not think that it is produced by anyone anymore so any help will be useful.

    Thanks.
     
  2. Kevin Caulfield

    Kevin Caulfield Subscriber

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    Do you mean FX-39? The formula has never been published. FX-37 is reputed to be very similar. I use it regularly and find it similar enough to FX-39 for my liking.
     
  3. Sim2

    Sim2 Member

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    Hallo, I *think* that the FX-39/37 is the film dev from Paterson. The Acugrade FX-31 is/was a print developer for multigrade papers.
     
  4. Kevin Caulfield

    Kevin Caulfield Subscriber

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    Yes, FX-39 and FX-37 are film developers. I see, I didn't realise FX-31 was a print developer.
     
  5. Gerald C Koch

    Gerald C Koch Member

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    I have no record of a formula for this name as published in the BJ by Crawley. Remember he did not publish all of his formulas and some remained trade secrets of the companies to whom he sold them.
     
    Last edited by a moderator: Jan 4, 2014