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Subject: Bookkeeper process

Bookkeeper process

From: Lee H. Leiner <73173.1420>
Date: Thursday, November 17, 1994
Excerpts from press release from Preservation Technologies, Inc.:

It turns out that the Library of Congress evaluation did not come out
early this year, as we indicated.  Several things happened to delay the
report, most of them unavoidable.  We are now confident that the report
will be issued soon.  We are still not permitted to comment on the
results, but it is fair to say that no process has ever received a more
through evaluation than has Bookkeeper.

Despite these delays, we have not been idle.  In January we told you
about the purchase of the Bookkeeper I machine.  In nine months we have
folded a re-design of this machine into what we call Bookkeeper II, and
have designed and installed Bookkeeper III.  The new technology
expressed in this latest design has several improvements:

    1.  It treats the books in a vertical motion, which we believe will
        provide more uniform coverage of the paper.

    2.  It treats and dries the books in the same cylinder.  This will
        greatly improve our carrier recovery and, ultimately, provide
        lower prices to you.

    3.  The drying step is done utilizing a vacuum system which shortens
        the drying time and does not require heating which might reach
        temperatures that might damage the book.

The Bookkeeper III unit in our plant will treat 100,000 books per year.
It can easily be expanded to a larger volume with longer cylinders--or
an additional set of cylinders can be added at an incremental cost.  It
can be automated so as to require only one operator.  It is simple to
operate and occupies less than 200 square feet of floor space.  It will
easily fit in the corner of a library basement or a clean work room.  It
is environmentally friendly; no toxic chemicals, no flammables, and
minimum noise.

We now have two machines in our plant, each designed to do a different
deacidification job for books or archival papers.  We are working on a
new spray booth design that will allow us to recover more of the carrier
in spray applications, again lowering costs. For more info, call

Lee H. Leiner

                  Conservation DistList Instance 8:38
                 Distributed: Sunday, November 20, 1994
                        Message Id: cdl-8-38-010
Received on Thursday, 17 November, 1994

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