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染发前一天别洗头。头皮分泌的油脂,能在一定程度上避免有害物质通过头皮渗入体内。因此,染发前一天最好别洗头,也别用护发素,否则会影响着色效果。染发前做皮肤测试。染发前应取染发剂,涂在耳后或手臂内侧娇嫩的皮肤处,观察2~4天,如果没出现红斑、丘疹、水疱等过敏反应再染。发际周围抹点乳液。涂抹染发剂前,可在发际周围抹点乳液或凡士林油膏,这样如果不慎沾上染发剂,也比较好清洗。
Do not wash your hair the day before your hair. Scalp secretion of grease, to a certain extent, to avoid harmful substances into the body through the scalp. Therefore, it is best not to wash your hair the day before the hair, do not use conditioner, otherwise it will affect the coloring effect. Do a skin test before dyeing. Hair dye should be taken before the hair, painted in the ear or arm inside the delicate skin Department, observed 2 to 4 days, if there is no erythema, papules, blisters and other allergic reactions and then dyed. Wipe the hair around the hairline. Before applying the hair dye, apply a spot of emulsion or vaseline ointment around the hairline, so that if it is stained with hair dye, it is better to clean it.