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  1. #1

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    Sep 2008
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    Proper hardener concentrations

    For hardening my emulsions I have only ever used ChromeAlum and Chromium Acetate. The ChromeAlum needs to be used at a weight of 0.5% of the weight of the dissolved gelatin and the Chromium Acetate needs to be used at half that amount.

    I would now like to experiment with Glyoxal ,Gluteraldehyde and Mucobromic Acid. Does anyone know what amounts are best to use for those?

  2. #2
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    Apr 2005
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    Rochester, NY
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    I use all hardeners at the same concentration and weight/unit of gelatin. Nothing really critical about them unless you want to control the aldehyde effect on keeping. Aldehydes tend to cause after hardening and also fog emulsions.

    I suggest mucochloric acid over mucoobromic. I also suggest it be used mixed with formalin for best results.

    Actually, I don't suggest Glutaraldehyde due to the extreme toxicity of the fumes. I have read that there are outstanding lawsuits on this over the use of a glutaraldehyde hardening solution for some processes due to toxic reactions by some.

    PE

  3. #3

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    Jun 2009
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    Yeah that mucobromic acid gets me every time, especially when I'm congested.
    I brake for fixer!



 

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