Sunbathing filter with incomplete UV-B absorption

Details Sunbathing filter with incomplete UV-B absorption Sunbathing filter with incomplete UV-B absorption

1986-11-13

1988-12-27

Arnold, Bruce Y.

350311, 350318, G02B 522, G02B 700

Patent

active

047936681

ABSTRACT:
Apparatus for use in sunbathing comprises a screen formed of a sheet of thermoplastic or fiber material which is transparent to the safe UV-A wavelengths of solar radiation and the visible light range between 400-450 nm but which contains uniformly distributed therethrough a first agent which absorbs at least 80% of the UV-B radiation in the 310--320 nm range and all radiation below 310 nm, and a second agent and third agent which prevent transmission therethrough of some radiations above 450 nm wavelength, i.e. visible light and infra-red. The second agent may be an absorbing dye or pigment. The third agent may be finely divided carbon or ground glass. The screen may be mounted on a frame or fabricated into clothing so as to shield the sunbather from the acutely and chronically harmful wavelengths of radiation, to prevent unpleasant overheating, and to provide subdued lighting. The relatively small amount of UV-B transmitted through the material stimulates the production of new melanin in a sunbather, and this melanin will be later available for tanning by UV-A radiation.

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Potten, C. S., "Radiation and Skin", (1985), p. 192.
Honigsmann, M.D., H. et al, "Immediate Pigment Darkening Phenomenon, A Reevaluation of its Mechanisms", (1986).
Black, G. et al, "Lack of Photoprotection against UVB-Induced Erythema by Immediate Pigmentation Induced by 382 nm Radiation", (1985).
Gange, R. W. et al, "Comparative Protection Efficiency of UVA- and UVB-Induced Tans . . . Sensitive Sites in DNA by UVB in Human Skin", (1985).
Arase & Jung, "How We Do It--In Vitro Evaluation of the Photoprotective Efficiency of Sunscreens Against DNA Damage by UVB", (1985).
U.S. Dept. of H.E.W., NIOSH--"A Recommended Standard for Occupational Exposure to Ultra Violet Radiation", (1977).
Strickland, P. T., "Photocarcinogenesis by Near-Ultraviolet (UVA) Radiation in Sencar Mice", (1986).
Kugman & Kugman, "Review Article--The Nature of Photoaging: Its Prevention and Repair", (1986).

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