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  1. #11
    lee
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    I may be speaking out of another orphis than my mouth, I seem to remember that Amidol as a film developer really dumped shadow detail. Is this true?

    lee\c

  2. #12
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    No, you just looked outside the box. There are all kinds of marvelous things out there.

    It ocurred to me, and probably to you, that it would be a convenience to be able to keep amidol in a glycol solution and the rest in water, mixing just enough at a time to do a sheet of film or paper in a tube.

    The amount of sulfite may give some control over the color. You may not need the citric acid. Anyway, you have enough variables to keep you busy for a while.
    Gadget Gainer

  3. #13
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    I meant to address that last post to Tom, who wondered if he had stepped on a slippery slope.
    Gadget Gainer

  4. #14

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    Quote Originally Posted by gainer
    No, you just looked outside the box. There are all kinds of marvelous things out there.

    It ocurred to me, and probably to you, that it would be a convenience to be able to keep amidol in a glycol solution and the rest in water, mixing just enough at a time to do a sheet of film or paper in a tube.

    The amount of sulfite may give some control over the color. You may not need the citric acid. Anyway, you have enough variables to keep you busy for a while.
    Yes Pat, I have the Amidol as a PG stock concentrate and everything else as a water based stock concentrate.

    I'm a little surprised that I am seeing stain with 30 grams/liter of sulfite.

    I have been thinking about trying a TEA option for the "B" bath. Any advice?
    Tom Hoskinson
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  5. #15
    Jorge Oliveira's Avatar
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    Anyone for amidol + phenidone?

    Jorge O
    Curitiba - nice place to live, if you don't care about the weather...

  6. #16

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    Quote Originally Posted by juan
    Here's an article on Amidol as a film developer.

    http://simmonsphotos.com/Articles/AmidolFilm.html

    juan
    Thanks much, Juan! I'll add it to my collection.
    Tom Hoskinson
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  7. #17
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    I did try Amidol as a water bath developer back in the 70's~~

    http://f1.pg.photos.yahoo.com/ph/gle...&.dnm=10f0.jpg

    I made the mistake of not developing it long enough. I was following Ansel's instructions in "The Negative" (1968;pg. 117-118).
    "Just because nobody complains doesn't mean all parachutes are perfect."

  8. #18

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    Quote Originally Posted by Jorge Oliveira
    Anyone for amidol + phenidone?

    Jorge O
    Easy enough to try - so why not?

    Another possibility is amidol + ascorbic acid and maybe some TEA to get the pH back into the neutral to slightly alkaline range??
    Tom Hoskinson
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  9. #19
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    I haven't played much with amidol. It is potent enough to be used in acidic solutions. You might or might not gain by adding TEA, but first I would start from nothing but some sulfite. I think the citric acid is mostly for preservation, but it naturally reduces pH somewhat. Rather than leave it in and add TEA or other alkali, I would go with the simplest solution for starters and see what has to be added to make it better. In philosophy there is the principle of Occam's (sp?) razor that says the simplest theory that works is the best. Shave it down and let it grow if necessary.
    Gadget Gainer

  10. #20

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    Quote Originally Posted by gainer
    In philosophy there is the principle of Occam's (sp?) razor that says the simplest theory that works is the best. Shave it down and let it grow if necessary.
    Ah yes! William of Occam. I have recommend the use of his razor to a lot of people over the years. Most stare blankly at me and say - What?

    It's probably because I have a beard... Started growing it in 1969 - it was black then (white now).

    My understanding is that addition of a bit of citric acid to the working developer was the empirical result of a lot of experimentation by Michael Smith - confirmed by others.

    Amidol is known to work well as a developer in a slightly acid pH environment.

    There is an indication that Pat Dignan favored Ascorbic acid over Citric with amidol. I haven't been able to verify this yet and I have most of the Dignan notes.
    Tom Hoskinson
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