Research on Extraction of Natural Golden Cypress and Dyeing of Real Silk Fabrics
This paper extracts natural dyeing from golden cypress with water and uses it for dyeing of real silk fabrics;discusses the process of extracting natural dyeing from golden cypress;optimizes the process of dyeing real silk fabric with golden cypress extracting solution;evaluates the dyeing effect;and determines the appropriate process of golden cypress extraction,dyeing and fixation through orthogonal test and single factor analysis.The result shows that the optimal process of golden cypress pigment with water extraction method is: mass concentration of golden cypress 2.5 g/L,extraction temperature 100 ℃,extraction time 60 min and extraction once;the optimal process of direct dyeing of real silk fabric with golden cypress extracting solution is dye liquor pH value 7,dyeing at normal temperature and dyeing at constant temperature for 45 min after the temperature increases to 50 ℃.Dye-fixing agent can improve the color fastness of dyed real silk fabric appropriately.The optimal process of fixation is mass concentration of cross-linking agent 5 g/L,temperature 60 ℃ and dipping time 30 min.