Wool woven fabric was dyed for 120 min with N, N-dimethyl-p-aminobenzaldehyde (DMAB) or N, N-diethyl-p-aminobenzaldehyde (DEAB) at 60 ℃ and acidic condition, and then oxidized with H2O2 for 60 min, respectively. Some factors affecting process such as the concentration of DMAB, H2O2 and HCl were investigated with respect to color strength and characteristics. Additionally, dyeing fastness and breaking strength of dyed wool fabrics were also evaluated. The results indicated that increasing concentration of DMAB or HCl in dyeing bath caused a significant enhance in color strength (K/S) and chroma. There is the linear relationship between concentration of DMAB or HCl in dyeing bath and K/S value. The K/S value and chroma were improved by increasing concentration of H2O2 and HCl in oxidation bath, but decreased when H2O2 concentration was above 0.175%(wt). Moreover, wool woven fabrics dyed with two aromatic aldehydes have high soaping and rubbing fastness as well as breaking strength.
