Textile fibre produced from silkworm or filigree. It can be raw or processed, consisting of continuous filaments, long 800m, which are obtained by squeezing the cocoons; Chappe or floretto, also known as terzanella, made from waste from scraped cocoons and other scraps; Bourette, pelvis coming from the waste of the processing; Raw if not subjected to trimming; Softened or semi-sweet when subjected to light washing in hot water; Cooked if subjected to more energetic treatment, in boiling water, to remove any gum or sericin; Charged when subjected to salt treatment to make it heavy.