Kutter,
I have the ammonium chloride, I just havent got around to testing it yet.

Angier suggests between a 2-5% solution.

Do you know what the effect will be (in general) with the addition of ammonium chloride as opposed to just leaving out the mercury?

Im just trying to understand the role of the various chemicals in the solutions. It would be a tremendous time to test several solutions with several variations of the ingredients so Im wondering if anyone has done some of it.