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  1. #1
    John_Brewer's Avatar
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    Pyrocat HD + JandC Pro 100 + Pt/Pd

    Can anyone give me a ballpark figure for J and C 100 pro sheet film souped in Pyrocat HD in a Jobo CPE2? The negs will be used for palladium printing with Na2 for contrast control and maybe some gum.

    What dilutions of Pyrocat HD do people prefer for alt negs? I've seen 1:1:100, 2:2:100 and 2:1:100. What happens with the different dilutions?

    Thanks

    John.
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  2. #2

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    No help here but I will be looking at this thread really close.
    Technological society has succeeded in multiplying the opportunities for pleasure, but it has great difficulty in generating joy. Pope Paul VI

    So, I think the "greats" were true to their visions, once their visions no longer sucked. Ralph Barker 12/2004

  3. #3

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    Quote Originally Posted by John_Brewer
    Can anyone give me a ballpark figure for J and C 100 pro sheet film souped in Pyrocat HD in a Jobo CPE2? The negs will be used for palladium printing with Na2 for contrast control and maybe some gum.

    What dilutions of Pyrocat HD do people prefer for alt negs? I've seen 1:1:100, 2:2:100 and 2:1:100. What happens with the different dilutions?

    Thanks

    John.

    I am not sure I can help you. I tested some ASA 100 film from China distributed by JandC and if this is the same film I have some data. However, if it is a different film I have not used it.

    Sandy

  4. #4
    gbock's Avatar
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    John,

    I've used 2:2:100 for 11 minutes at 23°C with some success. I rate the film at EI 50. This is for pt/pd printing, BTW.

    Gerhard
    [FONT=Georgia][COLOR=DimGray]Member of the Contact Printers Guild[/FONT][/COLOR]

  5. #5
    John_Brewer's Avatar
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    Sandy, it could well be the same film, the label sealing the film bag has Chinese writing on it. I would be very interested in seeing your data.

    Gerhard, thanks for your info.

    John.
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    There are 10 types of people in this world - those who understand binary and those who don't.

  6. #6
    Alex Hawley's Avatar
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    John, ditto on rating it at 50 asa. My experience with this film is very similar to Gerhard's. Rating it at 100 doesn't allow enough shadow detail and the negatives are thin for contact printing.
    Semper Fi & God Bless America
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  7. #7

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    Quote Originally Posted by John_Brewer
    Sandy, it could well be the same film, the label sealing the film bag has Chinese writing on it. I would be very interested in seeing your data.

    Gerhard, thanks for your info.

    John.
    John,

    If it is the same film I would recommend about eight minutes of development at 72F, using the 2:2:100 dilution of Pyrocat-HD. This should give you a DR of about 1.75, which would be about right for palladium with a bit of Na2.

    This is based on rotary processing and is for scenes of normal contrast.

    Sandy

  8. #8

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    Sandy, sometimes I see 1:1:100 and others 2:2:100 for pyro hd. Why the divergence in dilutions among recommendations?

  9. #9

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    Oh, forgot to add, in response to John's initial question, what happens in general with diff dilutions?

  10. #10

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    I shoot the JandC Pro 100 at ASA 50. I develop it in Pyrocat HD at 2-2-100 for between 6-15 minutes, normal about 10 minutes. Im using tubes on a roto base and temp is about 50 degrees.

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