Study on the Dyeing of Silk Fabrics with Natural Dyestuff Copits

In this paper, silk fabrics were dyed with natural dyestuff copits. The effects of dyeing PH value, temperature, time, and dye solution concentration on the K/S values were studied. The ultrasonic dyeing was compared with conventional dyeing. The results showed that the optimal conventional dyeing process were dyeing PH value neutral, temperature 100°C, time 40min, the relative dyeing solution concentration 3%, and the optimal ultrasonic dyeing process were dyeing PH value neutral, dyeing temperature 40°C, time 40min, the relative dyeing solution concentration 3%. Ultrasonic dyeing process greatly improved the dye uptake and made obvious effects on energy saving.