Manotone - I think you are probably right. I'll have to try and remember
a bit of chemistry (did some once).
Thanks very much - this looks like just the information I was looking
for.
I imagine this toner could also be of use for silver prints produced by
any of the alternative processes if we are getting concerned with
keeping on topic! Salt prints, Van Dyke, Kallitype, Satista...
Peter
petermarshall@cix.compulink.co.uk