Coating prints with polyurethane wood finish

http://duke.usask.ca/~holtsg/photo/current/0273.htm

One more thought
Coating the the front of a colloidal silver image (Kallitype, Vandyke,
Argyrotype) with polyurethane may protect it from pollutants also -
since it seals the front of the paper. So maybe one would not need to
tone (therefore alter the image color) the print in order to increase
its permanence(?). What do you think?

TIA,
Loris.

P.S. I know the pollutants may attack from the back of the paper, but I
think the effect may not be as strong(?).
Received on Tue Jan 31 12:09:12 2006