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  1. #1
    Bruce Osgood's Avatar
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    In my surfing to find information on Xtol/Mytol I came across the following article:

    Storage life of photographic developers: Phenidone-ascorbic acid, and metol-hydroquinone types

    http://www.udmercy.edu/crna/agm/phenvitc.htm


    You may find this intgeresting -- or not.

  2. #2
    Jorge Oliveira's Avatar
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    Bruce

    I have seen this article before, but I had forgotten the deatils.
    My stock phenidone solution, in alcohol, lasts longer than the water-bissulphite one. I do not know how long (it finishes before exausting, I mix 200cc each time) but for sure longer than 6 weeks.

    Jorge O

  3. #3
    Bruce Osgood's Avatar
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    Quote Originally Posted by Jorge Oliveira
    Bruce

    I have seen this article before, but I had forgotten the deatils.
    My stock phenidone solution, in alcohol, lasts longer than the water-bissulphite one. I do not know how long (it finishes before exausting, I mix 200cc each time) but for sure longer than 6 weeks.

    Jorge O
    My stock phenidone fell apart in a matter of hours: 100cc water and 3g phenidone. I like the developer but will try Isopyoprl Alochol and..... how much phenodone do you use for 200cc?

  4. #4
    Jorge Oliveira's Avatar
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    I've mixed it 1% (that's 2g/200cc) but the latest batch is 2% (4g/200cc) - still using it.
    I've mixed it stronger since paper dev is ID-62, phenidone based besides the film one (I'm doing some tests with FX-37), so it will last longer.
    I mix benzotriazole 2% with alcohol, too.
    Try to get the most concentrated alcohol possible.

    BTW today I will mix more ID-62.

    Jorge O



 

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