[alt-photo] Removal of residual dichromate "burn" and chemistry behind it
pfriedrichsen at sympatico.ca
Thu May 17 00:45:54 GMT 2012
Just wondering if it is necessary to treat a carbon print with a
sulfite bath to reduce residual dichromate. I know that some of you
use sulfite baths on gum bichromates. What is the standard practice
for carbon if there is one?
Does a sulfite bath remove the light affected reduction products?, or
is it converting it to a less visible lower valence form, reducing
the intensity of the "stain" on exposed areas. Is a print made more
archival by this step?
Anyone know a bit more about what exactly is going on with sulfite reduction?
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