Could you share how you do that?
Thanks,
Kathy G
On May 15, 2008, at 3:17 PM, Susan Lunas wrote:
Hello, Jane,
My classmates and I tested various paper items that were labelled
"Archival" and even "Acid-free". Much to our dismay, some of these
items that purported to be archival'/acid-free, were actually
acidic.
Sooo, the tissue could fall into that category. We learned that we
needed to test every item to verify the claim of the vendor.
Susan Lunas
Jane Thompson wrote:
Good afternoon,
We found a roll of "archival" tissue paper purchased about ten
years
ago
which, when tested with an Abbey pen, indicated a high level of
acidity
throughout. This unscientific conclusion of a high level of
acidity
was
based on the fact that the mark made by the Abbey pen did not turn
purple. We then investigated the tissue in use with our museum
items
and found that it, too, failed to turn the Abbey "ink" purple.
Obviously, we have not taken coursework in paper chemistry.
It was suggested--in the case of the paper still rolled up and
in its
cardboard shipping box--that over the course of ten years, acid
from
the
cardboard box completely migrated into and throughout the roll of
tissue. Completely.
It was also suggested that tissue in use with (archivally) boxed
collection items had become acidic over the course of the ten
years due
to exposure to atmospheric particulates and general air
quality. (This
was the vendor's call.)
So, the questions are:
(a) Could a roll of presumably unbuffered, "archival quality"
tissue
paper left in its shipping box be completely and thoroughly
contaminated
by acid from the cardboard over the course of ten years? This
seems
pretty speedy to me, but then I'm only guessing.
(b) Could the same tissue paper in use in the collection become
acidic
through exposure to atmospheric particulates and air quality
here in
our
archive which enjoys fairly good environmental controls?
(c) And finally, the "duh" question--Because the tissue was
purchased
as unbuffered would this render a yellow reading from an Abbey
pen just
because it's supposed to, although that would seem counter-
intuitive to
me.
--Or possibly, we just purchased tissue paper ten years ago that
wasn't
what it purported to be . . . .
We would appreciate any comments
Thanks,
Jane
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