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Thread: Anybody using Pyrocat-HD or MC as a Compensating Developer?

  1. #101

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Quote Originally Posted by Mike1234 View Post
    Interesting... please keep it up!! Have you tried the selenium toner yet to add contrast?
    not yet....lucky i even got these posted....been real busy...
    My YouTube Channel has many interesting videos on Soft Focus Lenses and Wood Cameras. Check it out.

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  2. #102

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Pyrocat HD is said to be of reduced toxicity.
    There have been many posts re: toxicity of pyro, and some tend to extremes.
    I don't want to re-open freaking out over chemicals, but I would like a realistic assessment of precautions , if any. I'd do 4-6 rolls of 120 in SS tanks, with a little inversion agitation. The tanks always dribble, and I rinse my hands after I agitate now [ Xtol, fix etc]. Are nitrile gloves de riguer for men well beyond their child bearing years?
    eddie? Sandy?
    And I won't say, later, "But he told me to" if you think barehanded tank technique is of low risk.
    thanks

  3. #103
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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Ed, a few drops or splashes of Pyrocat-HD on your hands are not going to cause a problem. Merely wash it off. Just don't drink the stuff.

    It doesn't taste very good, anyways.

  4. #104

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?


    Sinar P, 240mm APO Nikkor
    4x5 TMY, Divided Pyrocat HD

    Here's another one from the same batch, developed in Divided Pyrocat HD.

    It was necessary to add overall contrast to the image, but it was wonderful not to have to even remotely worry about losing texture the high values.

    I can't decide which one I like better: DD-23 or Divided Pyrocat. I guess I'm.. divided

  5. #105

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    I think the risks involved with both pyrogallol and pyrocatechol in developing film have been greatly exaggerated, and sometimes distorted. If you mix solutions from powder with either chemical wear a mask and work outside or in a well-ventilated room. After that, wear gloves if you develop in trays. The solutions used in developing are very dilute and should not pose any risk in normal use.

    BTW, hydroquinone is in the same family of chemicals as pyrogallol and pyrocatechol and is only slightly less toxic. It is used in a wide variety of film and paper developers but you rarely read anything about its toxicity.

    Folks who are concerned about the toxicity of developers might want to use Xtol or some other ascorbic acid based developer.

    Sandy

  6. #106

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Quote Originally Posted by Ken Lee View Post
    Sinar P, 240mm APO Nikkor
    4x5 TMY, Divided Pyrocat HD

    I can't decide which one I like better: DD-23 or Divided Pyrocat. I guess I'm.. divided
    Ken,

    Compare a scene that has a lot of texture and detail with a fair amount of contrast. My impression is that there is more acutance with two-bath Pyrocat-HD than with divided D23, but I may be prejudiced!!

    Sandy
    Last edited by Ken Lee; 23-Feb-2011 at 19:11.

  7. #107
    Meat Robot Jay Decker's Avatar
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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Quote Originally Posted by Ken Lee View Post
    I can't decide which one I like better: DD-23 or Divided Pyrocat. I guess I'm.. divided
    Pyrocat negatives scan a little better for me, particularly in the highlights, and scanned results are my basis for success.

  8. #108

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Jay... I'm sure there are threads dedicated to film development aimed specifically for best scanning. Any idea where some of those threads are?

  9. #109

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    Quote Originally Posted by sanking View Post
    Ken,

    Compare a scene that has a lot of texture and detail with a fair amount of contrast. My impression is that there is more acutance with two-bath Pyrocat-HD than with divided D23, but I may be prejudiced!!

    Sandy
    You've never lead me astray !

  10. #110

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    Re: Anybody using Pyrocat-HD or MC as a Compensating Developer?

    I removed sulfite to get better edge sharpness, acutance.

    And bias my agitation pattern the same way.

    You can improve the results of D23/2 bath. I don't know whether it matches up the pyro.

    bob

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