System for the visualization of exposure to ultraviolet radiation
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United States of America Patent
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Jul 2, 1991
Issued Date -
N/A
app pub date -
Apr 27, 1989
filing date -
Mar 19, 1987
priority date (Note) -
Expired
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Abstract
Photochemical systems for the direct visualization of exposure to ultraviolet radiation that effect visible color changes involving a process in which a photoacid is formed upon irradiation of a nitro-substituted aromatic aldehyde with ultraviolet light and wherein proton transfer to a dye causes the dye to undergo a visible color change. The system undergoes such color change to an extent directly proportional to the cumulative amount of ultraviolet incident thereupon.
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