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  1. #21
    noseoil's Avatar
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    I think it is in the mixing, as John has said. I put the "a" solution into distilled water first, then add the "b" to complete. When using distilled water and Photographer's Formulary, there is no apparent change in color. When the mixture is poured out (minimal and stand development) it is a pale pink color.

    Use distilled water, mix a into solution, then add b. I use a small syringe for 4x5, 120 and 35mm. Use one for each solution. Mark them so there can be no mistakes or cross-contamination will result (different colors, bottles too, or sizes). Don't open more than one bottle at a time. Use a system to keep the "a" caps, syringe etc. on one side and then use the other side for the "b". tim

    P.S. This is great stuff, use it and you will like it.

  2. #22
    Ole
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    Pyrocatechin is very stable in neutral to acidic solutions, but deteriorates rapidly in alkaline solution. So you should never mix part A with part B before adding water.

    I don't mix a part B at all, but dissolve the appropriate quantity of carbonate in the final volume of water, then add part A. That way I only need one syringe!
    -- Ole Tjugen, Luddite Elitist
    Norway

  3. #23
    noseoil's Avatar
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    Ole, do you keep a pre-mixed solution of the "b" and water in a container, or do you mix each time? tim

  4. #24

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    pyrocat hd

    I had EXACTLY the same experience. Wore out the web site, Sandy quit replying to my emails, etc.

    Answer: make it yourself. It aint hard and it is a tad cheaper.


    Result-never had the problem again.

  5. #25
    Ole
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    Quote Originally Posted by noseoil
    Ole, do you keep a pre-mixed solution of the "b" and water in a container, or do you mix each time? tim
    I measure out the water, then weigh out the carbonate and dump it in. 10ml "B" corresponds to 7.3g Potassium carbonate.
    -- Ole Tjugen, Luddite Elitist
    Norway

  6. #26
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    I've done it the way Ole does for a couple of years now. Measure out the water - measure out the carbonate and add it to the water, then add the "A". Never any problems. I use Arm and Hammer Washing Soda for the carbonate and buy the A solution materials from Artcraft.
    juan

  7. #27
    Guillaume Zuili's Avatar
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    [QUOTE=Bruce (Camclicker)]...thank you, I've developed the B neg from today at 1:1:100 to make 300mL working solution, thinking it might be the total volulme but, alas, the B neg is equally BLANK.

    I'm afraid you don't have enough solution. With an expert drum, I always use 1 liter of working solution, whatever the number of sheet film.
    Hope that helps
    Guillaume

  8. #28

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    I had the same happen with PF PMK. I opened the kit and did a run with my 4x5 Nikor tank. Everything was fine. The next day I got 6 clear negs in the same sealed tank using a full 36 oz of developer. When I diluted the A and B, it turned the proper colors indicating it was good. The Tank was clean and film shot was part of a batch shot processed the previous day that developed OK.

  9. #29
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    If you want a pre-mixed liquid kit, Bostick and Sullivan has one that works wonderfully and has tremendous lasting strength. I'm finishing up the 500mL bottles I bought in June of LAST YEAR.
    Let's see what I've got in the magic trash can for Mateo!

    blog
    website

  10. #30
    Bruce Osgood's Avatar
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    IN CONCLUSION

    Shot the same image again today but made some modifications:

    Backed up the back up. I shot, in addition to the FP4+ A & B a holder of BPF 200.

    I processed 300 mL of 2+2+100 and again got blanks on both FP4 and BPH, though the FP4 does have a 'ghosting' of image.

    This led me to think perhaps my shutter is off or my meter. So I developed the back up backups in RODINAL 1:25 to confirm that the Pyrocat was OK and the meter or lens is the problem. You guessed it: quite nice negs from the Rodi., considering I just thru together the Rodinal and developed both negs for 8 min. The FP4 rated at 100 and the BPF @ 200. I could print either one.

    So I'm left to believe my Pyrocat went bad somehow, somewhere and I'll probably never know. Time to reorder new chemistry anyway.

    Thanks for all the assistance.

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