Gassed Yarns

GASSED YARNS

Ordinary cotton yarn has a fairly large amount of short fibre on its surface. It is the object of gassing to burn off the projecting fibres by passing the yarn several times through a gas flame or over an electrically-heated surface. Many single yams are gassed and two-fold yarns are thus treated when required for voiles, poplins, Venetians, etc. Yarns for mixing with silk yarn for lace singles, and double spun work, embroidery yarns from 2/6's upwards, yarns for mercerising, etc., are all gassed. The process renders the yarn darker in colour, and there is a loss of weight in gassing yarn which depends on the proportion of fibre burnt off. The loss varies from 5 per cent to 10 per cent, so the doubler uses 36's single for 2/40's, 54's for 2/60's, and 72's for 2/80's yarns.