Magenta TF3 fixer: Still OK?

Discussion in 'B&W: Film, Paper, Chemistry' started by srs5694, Oct 21, 2005.

  1. srs5694

    srs5694 Member

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    I've just processed a roll of T-Max 100 (the old TMX variety) using XTOL, a water stop, and TF3 fixer. This is only the second time I've used TF3 (the first was with Fomapan 100 film), and to my surprise, the fixer came out of the developing tank with a magenta tint, like that which normally comes out from the hypo clear step. (My hypo clear was also magenta.) I've never seen this before, so my question is whether the TF3 fixer is still good. I'm hoping that whatever dyes have come off won't interfere with the fixer operation, but if there are any "gotchas" in store, I'll just call this batch exhausted and go back to Arista Premium Powdered fixer for TMX. Thanks for any advice.
     
  2. Photo Engineer

    Photo Engineer Subscriber

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    There is no problem. This magenta color is a mixture of the sensitzing dyes and acutance (sharpness enhancing) dyes used in the film. They come out in the fix.

    Just make sure you wash well.

    A prewet before development is sometimes helpful in preventing this. Contrary to what many claim, it does no harm either, and actually helps prevent airbells.

    PE
     
  3. srs5694

    srs5694 Member

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    Thanks. I've never seen fixer take on color before, but I've also never used TF3 fixer with TMX. I just wanted to be sure the TMX wasn't "poisoning" the TF3. Is the dye coming out with the fixer because of TF3's pH (I've previously used traditional acidic fixers), or is something else at work here?
     
  4. Photo Engineer

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    The dye(s) are more soluable in the alkaline fix, I guess. I have not specifically run a test. I know that they dissolve in plain water if you use a prewet, and they dissolve slowly as you wash the film after fixing in a normal acidic fix.

    PE
     
  5. srs5694

    srs5694 Member

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    Thanks again. I guess I'll try a prewet next time, although based on what you've said the dye doesn't do any harm to the fixer.