Natural dye baicalin was applied to dye silk and nylon 6 fibers. The effects of dyeing temperature, time, pH and dosages of sodium chloride and baicalin on dyeing properties of silk and nylon 6 fibers were analyzed, the color fastness of dyed fabrics also investigated. It was found that, the optimal process conditions were as follows: dyeing at 90oC(silk) or 80oC(Nylon 6), with pH 4, for about 60min. The built-up properties of baicalin on silk and nylon 6 fabrics were good, the color fastness of dyed fabrics were above 3-4 grade.
A natural dye extracted from lac was applied to a silk fabric by the use of pad-dry technique under different conditions. The dyeing properties were evaluated by measuring K/S and CIELAB values. In addition, the different fastness properties were evaluated. The effect of dyes at different mordant concentration levels with respect to their colour strength was also studied. Silk fabrics dyed with lac extract showed a light pink shade, while those dyed with alum and stannous chloride pinkish-red colour. Silk substrates dyed with CuSO4 gave a purple red colour, while those dyed with FeSO4 had a reddish-gray colour. The fastness properties ranged from fair to good, while washing fastness was poor level.
The Effect of Dyeing Properties of Fixing Agent and Plasma Treatment on Silk Fabric Dyed with Natural Dye Extract Obtained from Sambucus Ebulus L. Plant