Degumming resulted in removal of the gums (sericin) and disintegration of the cocoons into lustrous fibers. In addition to sericin, wild silks cocoons are mineral- ized and contain considerable amounts of calcium oxa- late crystals that affect degumming and the properties of the cocoons. It has been reported that treating with ethylenediamine is effective in removing calcium oxa- late from the cocoon. Among the three layers of the co- coons, the outer layer of