Filter for protection against radiation, especially with regard to direct pigmentation by solar radiation

摘要

A radiation shield for promoting direct pigmentation of human skin by solar radiation comprising a filter made from a plurality of layers of synthetic plastic, e.g., polyester or inorganic glass, each filtering different ranges of wave lengths. Substantially all wave lengths below 320 nm and above 450 nm are filtered out so that rapid tanning of the skin is effected without burning.