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  1. #11
    gorbas's Avatar
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    Hi James,
    I had to dive deep in my "cold war" photo library. There is what i have found:
    Click image for larger version. 

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    As you can see, there is mention about developing agent but no information regarding alkali in developer.
    Thank you for the link for B104. Unfortunately I can't open it.
    Are you in Europe?
    Also I have 5 packs of original Agfa Atomal if anybody is interested.

  2. #12
    Ian Grant's Avatar
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    Quote Originally Posted by Gerald C Koch View Post
    Thw formua that I have for Atomal uses sodium carbonate as the alkali not sodium hydroxide.

    The developing agent Atomal is hydroxyethyl-o-aminophenol sulfate. It was also used in the May & Baker developer Promicrol. Eventually there was just not enough demand for the chemical and production ceased.
    Hydroxyethyl-o-aminophenol sulfate was used in Russia in a manufacturing process for something non photographic, that meant it was economic to produce, when the process ceased in Russiathere was no longer sufficient demand to allow manufacture at a low cost. Photographic use had always been a very small fraction of theproduction.

    Ian

  3. #13

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    Thanks Gorbas. Yes, I am in Europe - the UK.

    That looks like an English version of Orwo Rezepte - I would love a copy. If anyone has one going spare, or knows of one for sale, please let me know...

    @Ian - thanks for the confirmation!
    Last edited by James1; 02-18-2013 at 03:16 PM. Click to view previous post history.

  4. #14

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    Atomal

    Distilled water (50°C) …………………………………………… 750 ml
    Hydroxyethyl-o-aminophenol sulfate …………… 6.0 g
    Catechol ……………………………………………………………………………… 10.0 g
    Hydroquinone ……………………………………………………………………… 4.0 g
    Sodium sulfite (anhy) ……………………………………………… 100 g
    Sodium carbonate (anhy) ………………………………………… 25.0 g
    Potassium bromide ………………………………………………………… 1.0 g
    Sodium metaphosphate ………………………………………………… 1.0 g
    Distilled water to make ………………………………………… 1.0 l

    Since HEAP is no longer available I would suggest subtituting Metol which is chemically similar. Since the molecular weight of these two developing agents and their activity are different some adjustment in the amount would have to be made.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  5. #15
    gorbas's Avatar
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    Yes, James, Blast form the past! I grow up with ORWO films & chemicals and I like that little book. Unfortunately do not remember how i got it??
    If you need something specific from it, please ask!

    Goran

  6. #16
    Ian Grant's Avatar
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    You need to substitute the Hydroxyethyl-o-aminophenol sulfate with something like CD 4 to achieve the fine grain associated with Atomal.

    This is similar in many ways to Johnsons Meritol another ultra fine grain developng agent which is formed by combining Paraphenylene diamine with Pyrocathechin (Catechol.

    Ian

  7. #17

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    @Ian - interesting. I'm sure one of my reformulated packets of A49 stated one of the sachets contained CD1. That perhaps is the case for modern Calbe A49, but I don't have access to the MSDS to check.

    @gorbas - thanks. Would love a copy of the whole book :-) so not practical - but as mentioned, if anyone reading this knows of one for sale, I would be interested!

  8. #18
    AgX
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    Calbe do not list their classic b&w developers any longer.

  9. #19
    Ian Grant's Avatar
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    Quote Originally Posted by James1 View Post
    @Ian - interesting. I'm sure one of my reformulated packets of A49 stated one of the sachets contained CD1. That perhaps is the case for modern Calbe A49, but I don't have access to the MSDS to check.
    Calbe do use CD-1 N,N-Diethyl-1,4-phenylendiammoniumsulphate in the re-frormulated version A49, it would be better than the CD 4 I suggested.

    This type of developer hasn't been fully explored and there's many possibilities.

    Ian

  10. #20
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    A49 prevents building up too much density at some rather contrasty working films. I like it for aerial films like Rollei Retro 80 or Superpan 200.
    ---
    Uwe Pilz

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