Sepa Toner Keeping Properties...?

Discussion in 'B&W: Film, Paper, Chemistry' started by pawlowski6132, Feb 16, 2012.

  1. pawlowski6132

    pawlowski6132 Member

    Messages:
    48
    Joined:
    Sep 29, 2009
    Location:
    South Bend
    Shooter:
    8x10 Format
    So...if I mix a batch of Sepa Toner (using Sodium Sulfide) is my working solution one and done? Does is have a certain capacity per session? I can't find anyting in the literature to suggest a useful life for my working solution.

    Thank you in advance for your thoughts,

    Joe
     
  2. Jim Noel

    Jim Noel Member

    Messages:
    2,165
    Joined:
    Mar 6, 2005
    Shooter:
    Large Format
    The working solution should be used in one day. If bleaching and/or toning times get too long, for me it is if time more than doubles, then it is time to mix fresh.
     
  3. pawlowski6132

    pawlowski6132 Member

    Messages:
    48
    Joined:
    Sep 29, 2009
    Location:
    South Bend
    Shooter:
    8x10 Format
    Thanx Jim. About how many sheets (and size) do you get out of normal batch in one session? Just curious.
     
  4. Rudeofus

    Rudeofus Subscriber

    Messages:
    2,603
    Joined:
    Aug 13, 2009
    Shooter:
    Medium Format
    Do you have separate bleach & toning bathes? If yes, you can revive the bleach by adding a spoonful potassium ferricyanide to the bleach. I did this yesterday and got two month old soup working again. If the toning bath doesn't tone anymore, it's exhausted, and you should toss it out.