Abstract: To acquire the relationship between the color characteristics of natural green cocoon and its cooking process, the article analyzed the influence of cocoon cooking process parameters, such as temperature, time and variety of green cocoon, on the color and degumming rate with orthogonal experiment. And its optimal cooking process was determined. The results showed that the primary and secondary sequence of the three factors influencing and color was temperature, time and variety. Degumming rate and color defference of green cocoon incerased with the increase of temperature and time. Compared with dark green cocoon, light green cocoon should choose a lower temperature and longer time for cooking, so that an appropeiate degumming rate is effected and the natural color is retained to the maximum.

Key words: natural green cocoon, cocoon cooking, color difference, degumming rate, color