• Journal of Digital Convergence
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• v.17 no.1
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• pp.357-364
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• 2019

This study comparatively analyzed hair damage by hair bleach particles and identified three different bleach particle sizes using a scanning electron microscope (SEM). The powdered bleaching agents made of ammonium persulfate (APS) and potassium persulfate had particle sizes of $131{\mu}m$, $72{\mu}m$ and $48.8{\mu}m$. According to a hair damage test, cuticle lift-up or peeling hardly occurred when small bleach particles were used. In terms of hair color, the hair bleached with larger bleach particles was the darkest, while the hair bleached with small bleach particles was the brightest. The results found that for bleaching agents that are more effective in easing hair damage, those with little particles should be used. In addition, it appears that the selection of particles depending on the degree of hair bleaching would enhance bleaching effects and reduce hair damage. The above process is a way to get great results in selecting a bleaching agent. It is anticipated that hair damage could be reduced during hair bleaching based on the above results.

• Textile Coloration and Finishing
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• v.26 no.1
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• pp.63-70
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• 2014

This study has attempted to figure out the effects of the surface heat of perm rods on hair. For this, after forming perm waves, hair damage and its causes have been investigated with a different hair bleach method. If hair was bleached immediately without shampooing after a perm using the heat of rods, great perm waves were formed. However, severe damage was found on the hair because of the heated rods. In addition, when hair was shampooed and dried after the perm, hair bleach was more effective. It has been confirmed that hair was damaged because of high temperature of the surface of the rods. In fact, the heated rods had a direct effect on hair damage. According to these results, it has been confirmed that heat-based perms can accelerate hair damage. Therefore, it is necessary to perform a study on the minimization of the heating of permanent tools.

• Analytical Science and Technology
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• v.20 no.6
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• pp.524-528
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• 2007

Variations of the twenty one metal components (Mg, Al, V, Cr, Co, Sr, Ba, Na, K Mn, Fe, Cu, Zn, As, Hg, Pb, Ca, P, Mo, Cd, Sb) were analyzed in human hair sample by inductively coupled plasma mass spectrometry (ICP-MS). The effect of bleach and permanent wave manipulation on the elemental composition of hair were investigated. It was found that the composition of hair varied with hair bleach and permanent wave. Hair sample was collected from male in the age of thirties. Hair sample (0.05 g) was added to the Teflon digestion bomb together with 1.5 mL of nitric acid and an appropriate amount of In as an internal standard. The sample was then decomposed in the microwave digestion system. In normal hair, the contents of V, Cr, Mn, Fe, Co, Cu, Zn, As, Mo, Cd, Sb and P were increased in permanent wave hair, and Mg, Al, V, Co, Sr, Ba, Na and K were increased in bleached hair. But Mg, Al, Sr, Ba, Hg, Pb, Na, K, and Ca contents were decreased with permanent wave hair, Mn, Fe, Cu, Zn, As, Hg, Pb and Ca contents were decreased with bleached hair.

• Journal of Industrial Convergence
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• v.19 no.3
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• pp.91-96
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• 2021

In order to express the ideal appearance, everyone, regardless of age or gender, invests boldly in appearance management. In particular, hair coloring and hair styling using irons are widely used and used. have. Therefore, for the purpose of presenting the efficient use of flat irons, the study of thermal analysis of virgin hair and bleach hair in 120℃ heat treatment is conducted. As a result of the study, it was found that the overall weight of bleached hair decreased more than that of virgin hair at all treatment temperatures of flat irons. Through this thermal analysis study that measures the weight change according to the temperature rise of virgin and bleached hair, beauty consumers provide information on the optimal temperature flat ironing procedure that can minimize hair damage and discoloration while maintaining color in hair subjected to physical friction. It is believed that it will provide them efficiently.

• Proceedings of the SCSK Conference
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• 2003.09a
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• pp.142-160
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• 2003

Most consumers have noted hair damage following coloring treatments. Proper evaluation of hair bleaching products must be performed using quantitative assessments of hair damage, though they are difficult, because of the slight fluctuations in hair composition. In the present study, we utilized a sensitive evaluation method for hair damage and found that the amount of soluble protein fraction extracted from hair under a reducing condition, termed labile protein, dramatically increased after bleaching.(omitted)

• Journal of the Korean Society of Clothing and Textiles
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• v.36 no.8
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• pp.875-884
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• 2012

Many Koreans have recently bleached their black hair to blond or a light color due to the influence of their favorite Korean idols. Bleaching effects were studied under various bleaching conditions, such as the concentration of oxidants, the ratio between bleach accelerant and oxidant, and treatment temperature and time. The degree of damage of bleached hair with the same color difference (${\Delta}E$) intervals was observed in SEM images, the retention of breaking load and the change of color after dyeing. The ratio between bleach accelerant and oxidant of 1:2.5 was an effective condition. $L^*$ values of the bleached hair treated with 9% oxidant increased to 90 min. At a treatment temperature of $30^{\circ}C$, $a^*$ values were maximum at 30 min and then decreased as time further increased; however, $b^*$ values of the bleached hair increased as the treatment time increased. At $45^{\circ}C$, both of $a^*$ and $b^*$ values showed a maximum at a specific time. Bleaching efficiency was influenced most by temperature, followed in order by time, and oxidant concentration. As the treatment time increased, $L^*$ values greatly increased with twice treatment; however, $a^*$ and $b^*$ values decreased. Bleached hair, which had a color difference of higher than 30, showed the scales were completely removed and the retention of the breaking load greatly decreased. Highly bleached hair showed a great decrease in $L^*$ values by dyeing; however, dyeing with bright colors was more indicative to the effect of bleaching.

• Textile Coloration and Finishing
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• v.27 no.3
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• pp.219-227
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• 2015

This study aims to propose a method to reduce hair damage after investigating the following: the factors which vary depending on hair treatment conditions; the degree of hair damage in the bleached sample; and an analysis of the effects of a perm on wave formation. To determine the effects of these treatment types, hair bleach was mixed with the hair treatment, and hair damage and formation of permanent waves were examined. Using a scanning electron microscope, in addition, morphological changes were analyzed and the following results were obtained: After mixing natural powder(2.5g) and hair cream(2.5g) and bleaching the mixture, it was compared to the scale structure of untreated hair. When 5g of natural powder was mixed and bleached, a clear layer was observed among cuticle scales, showing the effects of hair treatment. Therefore, this confirms that the effects of hair treatment were most notable when grain powder was mixed with hair cream. Once hair is damaged, it is almost impossible to regain its original state. When chemical agents are used, therefore, it is important to consider the possible hair damage they cause.

• Fashion & Textile Research Journal
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• v.7 no.1
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• pp.96-100
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• 2005

The bleaching is one of the worst factors which leads to the damage of the human hair. The cuticle of the human hair is injured by the alkali that is one of the chief ingredients of a bleaching agent. The alkali component of the bleaching solution chemically reacts with human hair, reducing the tenacity and dissolving the cuticle layer. The purpose of this study is to examine the effects of bleaching time and temperature on the physical properties and morphology. The results were as follows. 1. The stress-strain curves for human hair indicated the three distinct regions, such as Hookean region, Yield region and post-Yield region. The tenacity of hair is reduced gradually with an increase of bleaching time. Under these same conditions, elongation of the hair increased. 2. The greatest drop in tenacity for hair occured between $40^{\circ}C$ and $60^{\circ}C$ of bleaching temperature. 3. Compared with the virgin hair, bleached hair showed a slower rate of weight reduction in the TGA thermogram. The rate decreased gradually as the bleaching time and temperature increased. 4. As the bleaching conditions reached time and temperature extremes, the human hair cuticle became more damaged. The cuticle layers seemed to have dissolved, as seen in the SEM photographs.

• Journal of environmental and Sanitary engineering
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• v.18 no.2
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• pp.75-86
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• 2003

This study was designed to identify the relationship between general characteristics and personalities of college students majoring in beauty art. For this, 286 female students from two colleges in Kwangju were interviewed using a questionnaire pertaining to their general characteristics, hair-style and personality from September 20 through 30, 2001. A $x^2{\;}-{\;}test$ was implemented to identify the relationship between hair-style, personality and other variables. The results are summarized as follows: 1 To define characteristics in relation with hair-style, how students decide their hair-style was examined and, as a result, it was reported that 80.8% of targeted students decided by themselves and 19.2% decided by others' suggestions. 2. It is reported that there was no statistically significant relationship among socio-demographic characteristics such as the length of hair, grades, allowances, religion, satisfaction of campus life, and characteristics relating to hair-style such as accessories, mood, shape of face, decision of hair-style, and texture of hair. 3. Their preference of perm type had a statistically significant relationship with their allowance, religion and accessories, but not with their grades, satisfaction of campus life, mood, shape of face, hair-style, and texture of hair. 4. Dye and bleach had a statistically significant relationship with the texture of hair, but not with socio-demographic characteristics and accessories, mood, shape of face and decision of hair-style. 5. Personality of tenacity, extroversion and introversion, emotion and falsehood had no statistically significant relationship with hair-style. Finally, it was proven that strength, extroversion and introversion, emotion and falsehood had no statistically significant relationship with hair-style. More studies to identify personal tendencies that may affect hair-style are necessary.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.46 no.3
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• pp.295-305
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• 2020

Treatment for beauty using oxidizing agents damages hair with inducing structural alteration in cuticle layer, degradation of protein, and loss of lipid. This study connects a frictional coefficient upon the damaged hair by an instrumental test to the texture test by human being, and considered a moisture as a factor of the damage. A friction coefficient has been measured upon the hair with successive treatment of dye, perm, and bleach. The friction coefficient from the hair dye-treated three times was defined with 0.60, where 58% of answerer indicated an initial damage point as the hairs of iteration of dye-treatment increased. Even bleach treated three times results in 0.84 of friction coefficient corresponding to 88% of answerer attributed the hair to an initially damaged hair. In order to figure out a lipid loss in hair for human being to respond damage, a friction coefficient of the hair was controlled by removing 18-methyleicosanoic acid (18-MEA). The initial damage has been recognized by 0.60 of the friction coefficient for the 68% of answerer. Since moisture is the largest portion of the components in hair, moisture analysis has been performed to study a relationship between texture of damage and the friction coefficient from an instrumental evaluation. As an iteration of dye increases, the hair became hydrophilic with smaller contact angle. It is found that a damaged hair by dyeing possessed more than 0.42% of moisture compared to a healthy hair. Finally, it is elucidated that an increase of moisture in hair induced higher adhesive force corresponding to the friction coefficient, and the friction coefficient above 0.6 is attributed to the preception of hair damage.