Sunscreens:regulations,technical and commercial development

摘要

The dangers and benefits of the sun have been felt since time immemorial.In Ancient Egypt the cult of the Sun God Ra provided a sun-centerea cosmology where Egyptians bowed in worship to the powerful effects of the life-giving sun.The Ancient Egyptians were well aware of the dangers of the sun.Their lands were scorched with heat.Women protected their skin,preferring light-skinned to dark in their cultural hierarchy of beauty(1).In modern times,the first reported use of commercial sunscreens in the world was in 1928 in the United States with the introduction of an emulsion containing two sun screening chemicals,Benzyl Salicylate and Benzyl Cinnamate(2).