solar radiation, by the way, he named the cream after the mountain he climbed and received a burn, pizbuinthe 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 skin cancer and skin melanoma, are associated precisely with excessive exposure of the skin to ultraviolet radiation, although this is of course not the only factor, you need to clearly understand, because both skin cancer and melanoma can develop in areas that are never exposed, but no less practically, if we talk