Abstract : Recently the infuence of ultraviolet ray of UVA range (320 to 400nm) on human skin has been studied. So a sunscreen agent is expected to shield UVA as well as UVB (290 to 320nm). In this report, the transparency and the UV shielding properties of inorganic UV shielding agents are discussed. Consequently
ATP 4-93 Sustainment Brigade August 2013 DISTRIBUTION RESTRICTION.Approved for public release; distribution is unlimited. Headquarters Department of the Army