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Re: Copy Press info

The paper needs to be thin (Japanese tissue paper was much used in copy
books) and the ink needs to be hygroscopic, if a good copy was expected.

A typical iron gall ink (tannic acid, ferrous sulfate, gum arabic, and
water) could be made into a copying ink by adding either grape sugar,
glycerine, dextrine, calcium chloride, etc.

Most every historical society and many public libraries will have one or
more old copy/letter books to look at.


Jack C. Thompson
Thompson Conservation Lab.
7549 N. Fenwick
Portland, OR  97217

503/735-3942  (voice/fax)


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