Bookbinding canvas

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Buchbinder canvas (engl. Book cloth ) for coating covers of a book , Kartonagearbeiten and the like, is made of light but dense harvested cotton fabric ( Calico made), which is dyed in the usual way or printed and then to give it greater rigidity, a strong on one side To give gloss and a high degree of resistance to water absorption, treated with a special finishing compound .

Procedure

100 parts of chlorine magnesium are dissolved in as much water as is necessary to dissolve 100 parts of starch, 1 part of hydrochloric acid is added and the solution is heated to 90 ° Celsius for one hour. It is then neutralized with lime water, boiled once and applied to the fabric with a sponge or a finishing machine. After this has dried in a stretched state (on a stenter frame or tenter ), it is calendered , smoothed, and probably immediately embossed on roller smoothing machines to give it a special pattern. The product turns out better if it is first calendered and then, slightly damp, runs through the press rolls .

The surface of the bookbinder's canvas is either matt or, more commonly, very shiny. The matt varieties are ready after the process described. The shiny ones are painted over with bright, very pure linen water before embossing. However, this coating is not fully waterproof, even if alum is added, so that when a book bound in calico is used, every drop of water falling on it leaves traces.

A non-fragile shellac varnish therefore appears more suitable (prepared by boiling 10 parts of borax with 30 parts of shellac in 200 parts of water until dissolved and colored with permanent aniline dyes ) or with a coating of aluminum palmitate .

For special cases, e.g. B. If the books bound with bookbinding canvas are intended for use in chemical laboratories and the like, even one side is impregnated with rubber or prepared in the manner of wax cloth.

See also

Web links

literature

  • Krupp Andrea: Bookcloth in England and America: 1823 - 50 . Oak Knoll Press [u. a.], New Castle, Del. [u. a.] 2008, ISBN 978-1-58456-213-9 (English).
  • William Tomlinson, Richard Masters: Bookcloth 1823-1980: a study of early use and the rise of manufacture, Winterbottom's dominance of the trade in Britain and America, production methods and costs and the identification of qualities and designs . Montecito Press, Stockport [u. a.] 1996, ISBN 0-9527736-0-0 (English).