Tram silk

When there is no indication of the loss undergone during the ungumming of the silk prior to weighting, such loss is usually taken at 25% for organsine and 20% for tram silk, so that with 75 or 80 parts of fibroin found there correspond 25 or 20 parts of sericin. 

Example 2-751 grams of tram silk, after treatment with HC1 and KOH arc reduced to 1-254 gram, this yielding 0 185 gram of ash. Thus,... 

Thrown silk or grege consists of two or more threads of raw silk reeled together and given a slight twist. Thrown silk is used for making organzine and tram. 

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