Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2019 / V.31,no.3,Sept Title Hair Bleaching and Degree of Damage by Thermal Treatment Authors Yu Rim Seong, Eun Ju Kang and Sun Nye Lim* Institution/Affiliations Dong Shin University Pages/Total page pp.155 ~ 164 / 10 Language Korean Abstract Abstract This study comparatively analyzed hair bleaching and degree of damage by the temperature of a heating tool after coloring hair with a permanent, semi-permanent or plant hair dye. According to analysis by spectrophotometer, ‘semi-permanent hair dye’ was the highest, followed by ‘permanent hair dye’ and ‘plant hair dye’ in terms of changes in L* values. In terms of changes in hair shape when analyzed using FE-SEM, ‘semi-permanent hair dye(150˚C or lower)’ was the greatest, followed by ‘plant hair dye(180˚C or lower)’ and ‘permanent hair dye(200˚C or lower)’. Therefore, it is reasonable to flat iron hair at low temperature. According to the test, amino acid values gradually decreased in both bleached and colored hair. The results obtained through TGA-based thermal analysis confirmed that as brightness increases, hair moisture contents decrease. This study aimed to protect hair by suggesting a correct use of a flat iron by the hair dye type during hair coloring. It appears that the study results would help hairdressers minimize hair damage by using a hair dye at proper temperature. Keywords Keywords bleaching, temperature, spectrophotometer, FE-SEM, TGA Download   Reference