View Full Version : Proper hardener concentrations

10-07-2008, 12:58 PM
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?

Photo Engineer
10-07-2008, 01:09 PM
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.


08-02-2009, 01:05 PM
Yeah that mucobromic acid gets me every time, especially when I'm congested. :D