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在日常生活中,头发会不时受到种种伤害。这些伤害可分为以下三种类型: 机械性伤害:梳理和经常做发型都是导致这类伤害的原因。梳理蓬乱的头发时往往造成机械性损伤。粗暴地梳理湿头发的危害尤其严重,可能会造成头发断裂。 化学性伤害:染色、脱色、烫发以及在日光下曝晒都可能引起化学性损伤。在漂染头发或烫发时所用的溶液会促使头发内二硫化物键断裂,削弱头发的强度,在头发处于湿润状态时这种损伤作用更加严重。这会促使头发表皮弱化,在日常护理时极易脱落。表皮脱落会导致发稍分叉。表皮的脱落速度决定着头发能够增长的长度。
In everyday life, hair can be hurt from time to time. These injuries can be divided into the following three types: Mechanical injuries: Combing and regular haircuts are the causes of this type of injury. Grooming of disheveled hair often results in mechanical damage. Rough combing of wet hair is particularly damaging and can cause hair breakage. Chemical Damage: Dyeing, bleaching, permanent waving, and exposure to sunlight can cause chemical damage. The solution used to bleach hair or perm the hair can cause the disulfide bonds in the hair to break, weakening the hair’s strength and damaging the hair when the hair is wet. This will make hair cuticle weakened, easy to fall off in daily care. Epidermal shedding can cause hair to split slightly. The rate of epidermis shedding determines the length of hair growth.