In the article, a characterization is made of fifteen Japanese tissue papers offered by two firms from the Fed. Rep. of Germany: "Oskar Vangerow" from Munich and "Japico Drissler Feinpapiere” from Frankfurt-am-Main. The characterization is based on the author's own studies, carried out in the Chemistry Institute at the Department of Preservation of Works of Art, the Academy of Fine Arts in Warsaw. In the course of these, the durability of the papers was evaluated through the 'omparison of their whiteness, self-rupture and the number of double bends before and after artificial aging. The durable tissue papers, recommended for preservation work on the most valuable objects with a paper base, are from: Kashmir, Tengujo, Tengujo- Kashmir, Mino-Tengujo, Bib. Tengujo and Gampi. The remaining tissue papers are characterized by excessive acidity and some even by considerable loss of resistance to bending during aging, for which reasons they are not recommended for preservation purposes.
Handmade Japanese paper comprises material used in the conservation of works of art for the purposes of doubling, under-gluing, and the supplementation of gaps, as well as auxiliary work connected with the conservation not only of paper but also paintings and fabric. A list of basic information about washi can assist in the selection of suitable paper. The quality of paper is affected by properties of the fibres from which it is made. The process of production itself can exert considerable impact on the durability and features of Japanese paper. Paper traditionally produced in Japan possesses original names and characteristic. It is highly recommended to use paper tested in Western laboratories, although the information offered by the producer and own observations could be also helpful in determining quality.
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