Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,012   Posts: 1,524,701   Online: 812
      
Results 1 to 3 of 3
  1. #1
    Jim Moore's Avatar
    Join Date
    Oct 2003
    Location
    Iowa
    Shooter
    Large Format
    Posts
    885
    Images
    16

    Pyrocat HD 1:1:100 vs 2:2:100

    Dumb question time.

    Is it better to us 2:2:100 if I would like to contact print on AZO?

    If my tests where done with 1:1:100 how should I adjust my development time using 2:2:100 (Jobo w/expert drum)?

    Thanks!

    Jim
    "You miss 100% of the shots you don't take"...Wayne Gretzky

  2. #2
    gainer's Avatar
    Join Date
    Sep 2002
    Posts
    3,726
    Images
    2
    The staining action of Pyrocat HD makes contrast higher with graded paper than with VC. Sandy King will probably chip in here, but it may be that you do not need to change anything about your development. The higher negative contrast may be balanced by the lower illumination contrast of contact printing.
    Gadget Gainer

  3. #3

    Join Date
    Dec 2002
    Shooter
    Large Format
    Posts
    6,242
    The 1-1-100 dilution is normally used to develop negatives to the density range suitable for enlarging.

    The 2-2-100 dilution is normally used to develop negatives to the density range suitable for contact printing on Azo or alt process.

    The times should equate since the two processes require negatives of differing density ranges and correspond to the equivalent SBR of both.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin