[Cosmetic acne and a test of comedogenicity]. / Acne cosmetica e test di comedogenicita'.

A comedogenic test was carried out on the internal ear canal of four adult, masculine, albino rabbits, using butter of cacao and linseed oil, both known to be present in various cosmetic products. Histologic observation after 14 days showed follicular hyperkeratosis conferming the validity of this test.