Boiled-Off Silk

Boiled-Off Silk
BOILED-OFF SILK, II
The product of the boiling-off (also called, degumming) process, in which raw silk, thrown silk, or fabricated silk is subjected to a treatment in hot water, soap and other solutions to dissolve and remove the gum or sericin, which is the coat protecting the clean fibre filaments of a thread from becoming separated, and to remove tints, dirt and other foreign substances which are not inherent in the nature of the silk. (Official definition, U.S.A.) ————————
BOILED-OFF SILK, I
Undyed thrown silk which has had the natural gum removed by boiling in soap solution. This process of boiling-off removes about 25 per cent of the weight. It is a necessary operation (same as degumming). Before boiling-off the thread is harsh, stiff and dull, but afterwards it is soft, flexible and lustrous.

Dictionary of the English textile terms. 2014.

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