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A New Approach to the Evaluation of Broad‐spectrum Sunscreens against Ultraviolet and Visible Light‐induced Delayed Tanning
Author(s) -
Kawada Akira,
Morimoto Koukichi,
Hiruma Masataro,
Noda Toshiaki,
Ishibashi Akira
Publication year - 1994
Publication title -
the journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 65
eISSN - 1346-8138
pISSN - 0385-2407
DOI - 10.1111/j.1346-8138.1994.tb01795.x
Subject(s) - sun protection factor , broad spectrum , visible spectrum , ultraviolet , ultraviolet a , spectrum (functional analysis) , dermatology , broad band , electromagnetic spectrum , ultraviolet light , materials science , photochemistry , chemistry , optics , optoelectronics , medicine , physics , combinatorial chemistry , quantum mechanics
Protection against UV and visible light‐induced delayed tanning (DT) and immediate tanning (IT) of two broad‐spectrum sunscreens with the same sun protection factor was investigated. Protection factors (PFs) against DT (24 h and 7 days) of the sunscreens differed significantly, but PFs against IT did not. This study indicates that using PF against 24 h DT is more appropriate for an evaluation of broad‐spectrum sunscreens against UVA and visible light than IT.