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  1. #21

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    Quote Originally Posted by Gerald C Koch View Post
    One other point I would like to make. The Beutler formula and Neofin Blue are NOT the same
    Good point. They are often assumed to be the same. And the "Neofin Blue" developer from Formulary is not Neofin Blue.

  2. #22

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    From the latest MSDS Neofin Blue contains

    DTPA 1 - 5%
    Metol < 1%
    Phenidone < 1%
    Hydroqquinone < 1%
    Potassium carbonate 5 - 10%
    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

  3. #23

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    At some point it apparently contained Catechol. I can't confirm that.

  4. #24
    Ian Grant's Avatar
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    Quote Originally Posted by Michael R 1974 View Post
    At some point it apparently contained Catechol. I can't confirm that.
    So did HC110. Pyrocatechin and Hydroquinone can be interchangeable when it's not a staining developer although Pyrocatechin will give fine grain on it's won unlike Hydroquinone.

    Ian

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