용매에 따른 반영구 염모제의 모발염색 효과(Ⅰ)

Effect of Solvent in Hair Dyeing with Semi-permanent Hair dyeing

Although permanent hair dyeing gives an advantage to wash fastness, it may introduce damages on hair skin from the oxidant used. On the contrary, when acid dyes are used for semi permanent hair dyeing, they show poor wash fastness in the absence of damages on the hair. In the present study, the milling acid dyes, such as C.I. Acid Red 114 was chosen to approach the appropriate conditions for semi-permanent hair dyeing. The chemical structures of dyestuffs were characterized by UV and FT-IR analysis. The maximum absorption wavelength determined by the UV-visible spectrum were 620㎚ for the respective dyestuff of C.I. Acid Red 114. the dyeing solution containing solvents such as acetophenone(C6H5COCH3), benzyl alcohol(C6H5CH2OH), ethyl alcohol(C2H5OH), propyl alcohol(CH3CH2CH2OH) and tributylphosphate. In this work, we investigated the effects of benzyl alcohol in hair dyeing with C.I. Acid Red 114 acid dye. When benzyl alcohol was added in the bath, the uptake of C.I. Acid Red 114 was increased dramatically. Dyeability of hair increased significantly by adding benzyl alcohol in C.I. Acid Red 114 . Neverthless the hair was slightly damaged during dyeing, the dyed hair showed a good wash fastness.