Unverified75% confidenceFactTime unknown
香精浓度（fragrance load）8%-10%为优质区间：低于6%香味弱、扩散范围小；高于12%易产生刺鼻感和黑烟。标注天然精油（essential oil）比合成香精更温和但留香时间通常更短
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75%
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Unverified香精浓度（fragrance load）8%-10%为优质区间，低于6%扩香弱冷香几乎无味，高于12%易出现刺鼻感和黑烟，且高浓度香精多为合成香料97% similarUnverified香精浓度（fragrance load）在6-10%为佳：低于6%香气扩散弱、高于12%易产生黑烟和刺鼻感。天然精油（essential oil）香型扩香范围小但更温和，合成香精扩香强但持久性刺激97% similarUnverified香精油含量（fragrance load）6%-10%为佳，低于6%香味扩散弱，高于12%易产生刺鼻感并加重黑烟；标注'精油含量'比只标'天然'更可信97% similarUnverified香精浓度（fragrance load）6%-10%为佳：低于6%冷香扩散弱，高于12%易产生刺鼻感和黑烟；标注含天然精油（essential oil）比纯合成香精更耐闻、头晕概率更低97% similarUnverified香精浓度（fragrance load）6-10%为佳：低于6%冷香/热香都弱，高于12%易头晕且燃烧不完全产生黑烟。天然精油香薰浓度通常≤5%，扩香范围小需靠近才闻到94% similar
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