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Thread: Stop bath after selenium toning?

  1. #1

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    Stop bath after selenium toning?

    Yesterday, I used a 2-3 ℅ acetic acid bath on fresh selenium toned fb papers. My stop turned orange and though I am sure my stop was used correctly, per Tim Rudman's book on master darkroom printing, I"m not confident this method does more good than harm.

    Is anyone here using an acid stop, after this particular toning, or no?

    Any thoughts or guidance about this topic are welcomed.

  2. #2

    Re: Stop bath after selenium toning?

    Fix for 3 minutes. ..toned as required then wash
    I usually wash for 30 minutes then use HCA FOR 5 minutes
    Wash again for another 40 minutes

  3. #3

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    Re: Stop bath after selenium toning?

    There's no reason I know of to use a stop bath after selenium toning alone. Why are you doing this and where did you get this workflow?

    I'm not an expert on many other toning methods, and maybe some of them require an acidic clearing bath or something, but I've never heard of one being necessary after selenium toning. That said, I can't really see where it would hurt either... As for your stop turning orange, it's likely selenium compounds reacting with the acid, but I'm not sure exactly what.

    FWIW, my workflow: .... second fix, directly into the toning bath, directly into wash aid, wash (60 minutes), squeegee, dry face-up on screens. Notice that there are no intermediate washes/rinses. Works well for me and has for years.

    Best,

    Doremus

  4. #4
    Pastafarian supremo Rick A's Avatar
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    Re: Stop bath after selenium toning?

    The only thing I can find about stop bath in Tim Rudman's Toning book is he recommends fresh stop between developing and fixing, nothing about using it after toning.
    Rick Allen

    Argentum Aevum

    practicing Pastafarian

  5. #5

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    Re: Stop bath after selenium toning?

    I could be wrong, but remember reading in in Rudmans book about putting the brakes on the sulfide toners with stop bath or maybe that was for removing diachrotic fog after toning.

  6. #6

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    Re: Stop bath after selenium toning?

    How about hypo-clearing agent after Se toning?

  7. #7

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    Re: Stop bath after selenium toning?

    I am puzzled too. FB prints that are going to be selenium toned should be properly fixed and very well washed first. I think I've read over the years that selenium toner has a little hypo in it, and washing again after toning is important too. But I don't see what stop bath after toning is good for. The selenium toner is generally well diluted to begin with, taking the print out of the toner and putting it in a tray of fresh water stops the process almost immediately.

    I always use a hypo clearing agent after toning and before the final wash and have never had a problem with it.

  8. #8

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    Re: Stop bath after selenium toning?

    Quote Originally Posted by Kevin Crisp View Post
    I am puzzled too. FB prints that are going to be selenium toned should be properly fixed and very well washed first. I think I've read over the years that selenium toner has a little hypo in it, and washing again after toning is important too. But I don't see what stop bath after toning is good for. The selenium toner is generally well diluted to begin with, taking the print out of the toner and putting it in a tray of fresh water stops the process almost immediately.

    I always use a hypo clearing agent after toning and before the final wash and have never had a problem with it.
    Kevin,

    You describe one method. It is also possible to transfer prints directly from the (second) fix to the selenium toner. This requires a fix with a pH close to neutral or alkaline, but it works just fine and saves time (and water) washing (you Californians should appreciate that). AA used a plain hypo second fix and transferred prints directly to the toner. I use Ilfor Rapid Fixer or Hypam at the 1+9 dilution and do the same, and have been for 30 years. A wash aid and thorough wash after toning is required even if the prints are washed before toning.

    I think we've pretty well established that an acidic stop bath after selenium toning is not needed or helpful.

    Best,

    Doremus

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