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.