Okay, this may be flogging the proverbial dead animal, but... I have been looking at the Bruce Kahn formula. To me, it looks like a gelatin-sized anemic salt print (The BK formula has a silver content of 5.1g to make a solution of 100ml whereas my salt print solution has 12g as per Reilly). I know that in salt prints, an excess of silver is needed to get the desired results as some of it washes out. Is the silver content related to what other chemicals there is in the emulsion, i.e can I get away with less silver using something else that is active in the emulsion and still get the same results? A standard (old technology such as say, Tri-X) film has, as far as I get it, a silver content of 1,5g per square meter. The same content of silver could also coat the same amount of paper. I am not sure of the Ag content of T-grain films but I believe it is lower due to some manufacturing differences. What I am really trying to figure is this idea of "silver-rich" materials. Let's say one makes a film with 3g silver per square meter. Apart from the obvious rise in costs, does it make any sense altering the levels of silver - and is there any limit to how much you can use in an emulsion?