Pyrocat-MC Experiences

Photographica,Projects — Jordan on September 26, 2006

I mixed up 100 ml of Pyrocat-MC (1/10th of the normal recipe) following Pat Gainer’s instructions, as described in my Pyrocat-MC article.

My results so far are best described as mixed. I’ve developed a couple of rolls of 35mm FP4 Plus and two rolls of 120-format Arista.EDU Ultra 200 (Fomapan 200), and while I was expecting thickly “coloured” negs, what I got was visually not too different from a regular B&W negative. Following Pat Gainer’s suggestions, I bleached one of my negs with Farmer’s Reducer (basically a dilute solution of K3Fe(CN)6 and thiosulfate) to remove the silver image, and got a very faint stained image as a result. The negs are very sharp, though, and scan nicely. The FP4 Plus (example here) was developed for 7 mins at 22C, while the Fomapan 200 (example here) was developed for 8 mins at the same temperature.


  1. This is an interesting derivative of the Pyrocat HD that I have started using – it would be useful to see negatives and prints from the same subject/film type procesed in each developer. I am concerned that the ascorbic acid may reduce image sharpness as it does in Kodak Xtol.

    Comment by Roger Staton — January 29, 2008 @ 8:29 am
  2. Roger — your comment is the first I have seen anywhere about ascorbic acid reducing sharpness, including in the technical literature! In any case, check APUG threads (you can just search) for comparisons. I mixed Pyrocat-MC because it is prepared in a non-aqueous stock solution, which helps storage life.

    Comment by Jordan — January 29, 2008 @ 8:34 am

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