> Greetings Earthlings...
> 
> I am interested in corresponding with anyone who has worked with the 
> French process "Mordancage".
David, I haven't looked it up, but as I recall, the spelling is 
"mordencage," with of course accent under the "c." I did it some, years 
ago -- if you mean the copper sulphate/hydrogen peroxide bleach where you 
wash out the softened silver in hot water, then re-expose to make a 
reversal, which may or may not have visible raised effect, as the 
gelatine under it dissolves with the original silver image, exposing the 
paper base ...
Once you have a formula (Glafkides?), I think you more or less have to 
wing it, as my impression was it's  different with different papers, 
tho not *that* different (I mean nothing like gumbi!), & once you get the 
wavelength, not difficult.....
Judy