Man's physical universe



Filaments finer than silk make possible very soft fabrics. Rayon cut

into small lengths and the new irregular thick and thin yarns have

created entirely new textures in fabrics. Transparent velvet, dull

satins, and textiles rivaling in beauty the finest cashmere are all

made from rayon.

Fig. 289. Wood may be twisted or bent after urea treatment. (Courtesy of

the U. S. Forest Products Laboratory.)

The cellulose in viscose, as the thick yellow cellulose solution is

called, may also be regenerated in the form of transparent sheets, one

well-known type of which is "cellophane," cellulosic film. Ribbons,

straws, and sausage casings are but a few of the products made by the

viscose process.

The E. L du Pont de Nemours and Company's "Fiber D" is a new

rayon fiber with a high degree of permanent crimp and other characteristics

now available only in wool.

This new fiber appears promising

as a substitute for wool in carpets, upholstery materials, wall coverings,

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