Dilute Sodium Thiosulphate and POP?

Discussion in 'Contact Printing' started by mark, Mar 11, 2005.

  1. mark

    mark Member

    Messages:
    5,264
    Joined:
    Nov 13, 2003
    I mixed 100 grams Sodium thiosulphate into 2000ml water. Do I need to dilute that more for POP? The print bleached just as fast as they do when I use very dilute commercial fixer without hardener. SHould I be expecting to see the bleaching happen slower with plain old hypo?
     
  2. Ole

    Ole Moderator Staff Member Moderator

    Messages:
    9,281
    Joined:
    Sep 9, 2002
    Location:
    Bergen, Norw
    Shooter:
    Large Format
    There's a difference between the "paling" of the image when fixing and the bleaching that happens in ammonium thiosulfate. 100 grams in 2 liters is a little less than I use - I think, I use about 1/3 cup in a trayfull of water :wink: