feel, looks and sheerness. Rayon can be produced in a thread as fine as silk for exceptionally fine gauges of stockings, also in a stouter thread for semi-service and service weights.
Another important point is that rayon yarns can be twisted up to a specific number of turns, this not only adding to their efficiency during knitting, but to the general construction of a stocking.
Rayon when it comes from the rayon producer has a twist of a few turns per inch, and it is possible to produce a stocking which will give satisfactory wear, and meet with consumer acceptance both from a quality and appearance point of view. The high twists now being given to rayon increase the improved appearance of the stocking by producing an effect of dullness, this being achieved by the breaking up of the light reflection, also the sheerness of the stocking is increased by the reduction of the diameter of the thread. Stockings made from this high twist have increased resistance to snagging. Undoubtedly, high twist improves the elasticity, or recoverability (the aptitude of the yarn to return to its original shape).
The conditioning of yarn is a very important factor, having the effect of:-
1. Maintaining the high twist in the yarn.
2. Helping to prevent the kinking of the yarn as it leaves the cone on which it is wound (thereby reducing “press-offs”).
3. Forming a clearer and more even stitch, resulting in the production of a better fabric from the knitting machine.
4. Protecting the fine rayon filaments against chafing by the action of the needles and other parts during manufacture.
Experiments are being made with cellulose rayon hose to improve the fit and appearance by:-
1. Reducing the slipping and twisting of the stocking when on the leg—giving a better cling.
2. Tending to give the stocking a greater resistance to snags and runs, also to chafing at heel and toe.
3. Correcting the abrasion weakness caused by perspiration.