Microwaves That Save Manuscripts
Sergent, Denis, UNESCO Courier
DEACIDIFICATION of manuscripts, books and archival documents is necessary today for two main reasons: the inferior quality of certain types of modern cellulose-based papers dating from the second half of the nineteenth century); and atmospheric pollution. Paper was formerly manufactured from textile fibres (linen, hemp or cotton) obtained from rags. Since 1850, cellulose fibres from broadleaf and coniferous trees have been used. The wood pulp is produced either by chemical or mechanical methods. Chemical pulp is of good quality, but paper made from mechanical pulp acidifies, especially when treated with sizing agents such as alum. This type of paper, used for newspapers or paperbacks, …
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Publication information: Article title: Microwaves That Save Manuscripts. Contributors: Sergent, Denis - Author. Magazine title: UNESCO Courier. Publication date: May 1989. Page number: 9. © 1984 UNESCO. COPYRIGHT 1989 Gale Group.
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