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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
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.
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
Last edited by Ken Lee; 24-Apr-2018 at 18:30.
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
Last edited by Ken Lee; 23-Feb-2011 at 19:11.
Jay... I'm sure there are threads dedicated to film development aimed specifically for best scanning. Any idea where some of those threads are?
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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