Superseded95% confidenceDecision RuleTime unknown
除薰衣草、茶树少数外，绝大多数纯精油不可直接涂抹皮肤，需用基础油(荷荷巴/甜杏仁)稀释至1-3%浓度，1%约每10ml基础油加6滴精油
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This knowledge claim has been superseded by newer content
精油用于皮肤按摩必须用基础油（荷荷芭、甜杏仁等）稀释，面部浓度≤1%（10ml基础油加约3滴），身体≤3%，纯精油直接涂抹易灼伤致敏Sources
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