jewelia (jewelia@erols.com)
Tue, 30 Mar 1999 13:29:46 -0800
i should have added that the carbonates--calcium or magnesium that is --
which are used to buffer papers -- causing most of us ph process problems
also act as optical brightners but the usual practice is to list the paper
as a buffered paper in that case--and this distinction is generally included
in most sales materials--meaning the ph of the paper is buffered presumably
to increase its archival properties--although i understand that some recent
evidence suggests the best paper is neutral acid-free--but many or perhaps
most conservators still use buffered materials extensively. in these cases,
then, it is not so much an archival problem, but when an additive in a paper
is a buffer many alt-photo processes are not compatible--suspect this for
buffered papers--and the buffered problem seems pretty evident in my
experience when it occurs.
a ps from jewelia
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