Discussion on techique to preserve pigments of naturally colored silk

For the problem of naturally colored silk′s pigment lost with the removal of sericin during scouring seriously,this paper aimed at preserving the pigment of naturally colored silk and color feature,and investigated the effects of different processes and process conditions on the relative weighting percentage and color feature through such methods as grafting,cross-linking and steaming.The experimental results indicated that: it is favorable for increasing the relative weighting percentage and apparent color depth by one-bath process of first grafting then cross-linking.In this method,when citric acid was used as acid medium,the change of color feature was insignificant.After pre-streaming,the process of first grafting then cross-linking is obviously better than the technology of first cross-linking then grafting.Compared with the untreated silk fiber,the saturation of processed fiber was lowered,and the color tone trended to green.