Purple PPD

Discussion in 'B&W: Film, Paper, Chemistry' started by michael_r, Aug 20, 2011.

  1. michael_r

    michael_r Subscriber

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    I bought a Formulary Developer 12 (Edwal 12) kit about a month ago. Everything looked fine in the box but yesterday I took another look in the box and all the paper labels on the bags, as well as the mixing instruction sheet looked like they had a purple stain. I took a look at the PPD bag and all the crystals have gone purple. I'm guessing the PPD is dead? Strange that other things in the box have also turned purple though. Leaky PPD bag? Not good since that stuff's pretty poisonous.
     
  2. mikebarger

    mikebarger Member

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    Did you contact them?
     
  3. OP
    michael_r

    michael_r Subscriber

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    Not yet. I bought it basically just to try out a few oldies and mess around a little, so I wasn't going to be using it for serious work. But I was curious to know if PPD turns purple with oxidation etc.
     
  4. Rick A

    Rick A Member

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    Contact Formulary before you do anything else.
     
  5. Photo Engineer

    Photo Engineer Subscriber

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    That PPD is bad, probably due to a leaky bag. They will replace it, I am sure. Contact them and do not use the chemicals.

    PE
     
  6. Gerald C Koch

    Gerald C Koch Subscriber

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    Developing agents like PPD and paraminophenol first turn purple and then brown as they oxidize. This posters experience points out the permeability of some plastics, polyethylene in particular.
     
  7. Mike Wilde

    Mike Wilde Member

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    I use PPD, and store it in a sealed glass jar ( old baby food jar) in my freezer. Yes, it does turn purple. I have used it while purple, and it seemed to work fine.