Direct dyeing of silk fabric with dyes extracted from walnut peel
Silk fabric is dyed with the dyes extracted from walnut peel. Taking the K/S value as the evaluation index, the dyeing process is optimized by single factor experiments and orthogonal test as follows: the pH value of dyeing bath is 2.5 ~3.0, the dosage of dyes is 100 mL/L, and dyeing at 100 ℃ for 45 min. The result shows that the dyed silk fabric features bright shade and high color fastness.