A misnomer. It should be called pigment paper, as explained in my book.
>My first impression was this process ussed some sort of carbon paper like
>we used with old typewriters (remember them).
It's a *lot* thicker than the old carbon paper.
>The process seems more like an Emulsion Transfer as with Polaroid film.
A lot more difficult though.
>Was ground carbon used at one time?
Yes. The name is from the French "procédé au charbon" as Poitevin, the
inventor, called it. I found the original patent, which I translated in my
Gum Dichromate book.
Luis Nadeau
NADEAUL@NBNET.NB.CA
Fredericton, New Brunswick, Canada
http://www3.nbnet.nb.ca/nadeaul/