Lowe N J
Department of Dermatology, University of California, Los Angeles School of Medicine.
Semin Dermatol. 1990 Mar;9(1):78-83.
Sunscreens are agents that attenuate the effects of ultraviolet radiation on the skin by absorption or reflection of part of the incident radiation or by interception of harmful products of its interaction with the Sunscreens may be applied topically or ingested; however, topical agents are by far the more common and effective and only they will be discussed in this report. Topical sunscreens are formulated as creams or lotions and are characterized by their sun protection factor, a measure of their efficacy against sunburning and their substantivity, their resistance against removal after application.
防晒霜是一类通过吸收或反射部分入射辐射，或拦截紫外线与皮肤相互作用产生的有害产物，来减弱紫外线对皮肤影响的制剂。防晒霜可局部涂抹或口服；然而，局部用制剂目前更为常见且有效，本报告仅讨论此类制剂。局部用防晒霜制成乳膏或乳液状，其特征在于防晒系数，这是衡量其防止晒伤功效的指标，以及其持久性，即涂抹后抵抗被清除的能力。
