in another part of the world, in switzerland, six years earlier , chemistry student franzheiter sufferedis face while climbing mountains in the alps. this also prompted the novice scientist to search for a solution to the problem. and already in 1946, gaither began selling his product. blocking solar radiation, by the way, he named the cream after the mountain he climbed and received a burn, pizbuin. the product from the swiss chemist, as well as the american gel, still had one drawback: it was very heavy and lay on the skin like an oil mask. gaither is already working on solving this problem worked for 16 years, but the work brought results . in 1962, he voiced the term that we still use today. protection factor, or in short, spf, is well known to us; it was he who invented creams with a waterproof effect. for a long time, it was believed that those who want to avoid the appearance of age spots should use products with spf. naturally, these were mostly women. however, every 5 years new research appears that suggests what to use. what is well known is that most skin tumors - this is both