| Abstract: | New Observations on the Natural and Artificial Light Protection of Skin The hitherto known properties and mechanism of action of artificial light protection agents on human skin have been compared with author's own investigations pertaining to the base on which the preparations are formulated, significance of the UV B-absorption and the interrelationships between erythema and pigment reaction. Following results could be established: 1. Solutions of light filters in volatile solvents can act strongly light protecting; 2. the light protecting action is not only dependent on the protective film formed on the skin; 3. substances without appreciable UV B-absorption (purines and pyrimidines) have light protecting action; 4. intensity of browning of the skin is dependent on the preceding erythema reaction. |
