The patch test of 3837 cosmetics were performed on 505 patients having eczematous, dermatits like lesions, acne vulgaris and chloasma localized on the face. From the viewpoint of the results, characteristics of various kinds of cosmetics were examined. Five percent in the examined cosmetics showed allergic reaction and strong irritant reaction which continues over 24 hours was 7 percent. Many lotions indicated primary irritant reaction, liquid cream had higher positive percentage value compared with that of cream. In majority of foundation creams, toilet powders, lip stics, rouges, packs and eye shadows, primary irritant reactions were dominant. Almost of detergent type cleansing creams showed high percentage value of strong primary irritant and allergic reactions.
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