Abstract: The pigment preservation method in walnut green husk was studied,including sealed refrigeration,freeze drying and natural air-drying.The best dyeing effect was achieved when the sealed walnut green husk was saved at 20 ℃.Compared with oxidation hair dyes,it caused less damage and had higher UV resistance to hair when dyed by walnut green husk solution in the same dyeing conditions.The main hair ingredients can be colored in walnut green husk solution based on the dyeing effect.The pigment extracted from walnut green husk was detected by NMR and was confirmed to be 5-hydroxy-1,4-naphthoquinone (juglone).After dyeing by juglone,the hair was brown,as the same shade when dyed by liquor extracted from walnut green husk.

Key words: pigment of walnut green husk, preservation method, coloration, 5-hydroxy-1,4-naphthoquinone