Ultraviolet ray-shielding agent and tube
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United States of America Patent
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May 25, 1993
Issued Date -
N/A
app pub date -
Jul 15, 1991
filing date -
Mar 28, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ultraviolet ray-shielding agent for selectively shielding ultraviolet rays while allowing a transmission of visible rays therethrough, comprising a visible ray-transmitting binder and extremely fine zinc oxide particles having an average size of 0.1 .mu.m or less in a mixing ratio of the zinc oxide particles to the binder of 1/10 to 10/1, and an ultraviolet ray-shielding tube for visible ray-irradiation luminescent lamps comprising a transparent substrate tube for sealing a light emission source therein, and a coating formed on a surface of the substrate tube and comprising the above-mentioned ultraviolet ray-shielding agent.
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