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  1. #11
    Flotsam's Avatar
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    So you are saying, 1 gram of PI to 20ml water? Thanks, I may try that.

    With RC paper, that fix, wash, develop test could probably be done without fear of contaminating your developer. It's a bit of a hassle though.
    That is called grain. It is supposed to be there.
    =Neal W.=

  2. #12
    rjr
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    Neal,

    there are many varying recipes on it which difer in quantity of PI, but they function all the same - but vary in application, you have to adapt the amount of PI solution vs. the amount of fix...

    One more example from Kodak, which is good for a ten times lifetime stock solution. ;-)

    http://wwwtw.kodak.com/cluster/globa....jhtml#1308927

    As promised, I digged out the report from Franz on the test - i was curious myself. Franz is a chemist, he repeated the titration five times over.

    See (in german): http://phototec.de/phorum_neu/read.p...=48812&t=48812

    In short and english: 500ml of 1+7 Tetenal Superfix (ordinary rapid fix), used with 5 Filmes, clearing time was 210 sec. Titration showed a silver content of 3,4g/l - WAY too much, while the clearing time indicated "good for at least another film".

    Then he took a fresh fixing bath of same scheme and added silver nitrate. His results:

    - PI, a 10% Solution
    - 1ml of that on 10ml Fix
    - prescipation at 21° ambient temp was stabile when the silver content hit the 2,8g/l mark.
    Tschüss,
    Roman

  3. #13

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    SNIP:
    Quote Originally Posted by rjr
    So it works with any fix, not just the one mady by Edwal.
    hey roman -

    the brine test is great for seeing silver saturation ... but it isn't very accurate ( as you have suggested ) .... in many cases, like with high capacity fixers, "spent", it just isn't .... i kind of wish everything was like that <gggg>


    SNIP:
    Quote Originally Posted by Flotsam
    John, I think that I will have to use that method from now on. Thanks for the info.
    sure thing - i'm glad i could help

    - john

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