Substituting AMP-95 for TEA in PC-TEA?

Discussion in 'B&W: Film, Paper, Chemistry' started by coisasdavida, May 2, 2013.

  1. coisasdavida

    coisasdavida Member

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    Hello all,

    I'm trying to make up a batch of PC-TEA here in Brazil. Phenidone and Ascorbic Acid were easy to find, but it turns out I need an special Army authorization to purchase TEA. Someone suggested I use AMP-95 to replace TEA.

    Has anyone ever tried this?
     
  2. Gerald C Koch

    Gerald C Koch Member

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    If you substitute AMP-95 for the TEA then the pH of the resulting developer solution would be too high. For comparison the pH of a 0.1M solution of the two amines is given as 10.5 for TEA and 11.3 for AMP-95. The developer would have to be reformulated using less AMP-95. I would suggest switching to PC-glycol.
     
    Last edited by a moderator: May 2, 2013
  3. coisasdavida

    coisasdavida Member

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    Gerald,
    Thanks for your reply.
    I have started a process to obtain a free sample of AMP-95.
    I'll give it a try and report back.