Natural silk waste is the production crop from silkworm rearing until to silk production. The result of this process could be used to filling up belt quilt, to produce spun silk, making handy craft, etc. There are several sources from this process as follows: 1. Pierced Cocoon, the result of breeding that have emerged from their cocoons: 2. Double Cocoon or doupion, which result when two cocoons have been spun too closely together, 3. Floss, brushed from cocoons before reeling, 4. Friese, the coarse and uneven silk fibre at the beginning and end of each cocoons, 5. Scrap, the machine waste left over from reeling, 6. Boiled Cocoon, the result of cooking cocoon, 7. Thin end cocoon, one or both ends of the cocoon are very thin and risk bursting when processed.