Word: benzoic
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Dates: during 1950-1959
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Chemical Screen. Popular suntan lotions and creams increase tolerance to light rays by factors of four to six, said Dr. Knox. A cream containing one of the best chemical screens known, para-amino-benzoic acid, will increase it a hundredfold. So .will the newest chemical sunscreen family, the benzophenones. Trouble with benzophenones is that they absorb all rays at the spectrum's blue end-including those needed for a fashionable tan. So Dr. Knox suggested that redheads and others with exceptionally fair skins who do not want to freckle use a shutout benzophenone preparation. Others less sensitive...