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  1. #11
    Alex Hawley's Avatar
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    Quote Originally Posted by Scott Peters
    Sandy, sometimes I see 1:1:100 and others 2:2:100 for pyro hd. Why the divergence in dilutions among recommendations?
    The 1:1:100 is for general silver printing (enlargements) while 2:2:100 is for contact printing.
    Semper Fi & God Bless America
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  2. #12
    John_Brewer's Avatar
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    Thanks for the input everyone.

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

  3. #13

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    Quote Originally Posted by Alex Hawley
    The 1:1:100 is for general silver printing (enlargements) while 2:2:100 is for contact printing.

    Yes, that is the basic reasoning. Contact priting with AZO and alternative processes requires negatives of much greater CI than silver printing. I wanted to normalize time of development and found by trial and error that this could be done for the two types of processes by changing dilution.

    In other words, a 1:1:100 dilution at 10 minutes will give a similar CI as 2:2:100 at about 6 minutes.

    Use the dilution that gives the most convenient time for your conditions.


    Sandy
    Last edited by sanking; 09-06-2006 at 06:04 PM. Click to view previous post history.

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