Textile fibre produced by the silkworm. Can be: Reeled, made of continuous filaments (length: 800m) obtained from the unravelling of cocoons; Schappe, spun silk, made of the waste from damaged cocoons and other waste; Bourette, spun silk, down from processing waste; Raw, if not degummed; Semi-boiled off, if washed lightly in warm water; Boiled off, if washed more thoroughly in boiling water to remove gum or sericin; Weighted, if treated with salts to make it heavier.

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