Grupo de color
The special aura of a bound book derives not the least from the binding material used. It is only since the 19th century that fabric was used as binding at all; before that, the binding was primarily made of leather upon which the early versions of the fabric binding were based. It is only in the 1930´s that natural, untreated cloth binding was generally accepted. At first the cloth was either linen or cotton; later, spun rayon was also used.
Bookbinding cloth is normally produced with the so-called plain weave. In this weave, the warp threads, which traverse the entire length of the material - i.e. with the grain - are woven together with the co-called weft threads that run at right angles to the warp in an over-and-under weave.
Spun rayon is well known in the production of clothing where it is also referred to as viscose. The viscose - and here the circle is complete regarding paper - is extracted from wood pulp by means of a chemical process, spun into threads, woven into a plain weave and coloured. From the resulting fabric bookbinding cloth is produced in two more steps: it is coated on the back side with a compound consisting of starch, flour and mineral additives and subsequently laminated with paper. If the "linen" (cloth) is smoothed with a calender (a machine consisting of two heated rotating cylinders) after the lamination it will take to being printed and embossed or stamped all the better.