Radiant energy – Invisible radiation responsive nonelectric signalling – Optical change type
Patent
1995-05-22
1997-03-18
Fields, Carolyn E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Optical change type
G01J 138
Patent
active
056125410
ABSTRACT:
An ultraviolet radiation monitoring kit comprising at least one first substrate and at least one second substrate, the second substrate being capable of being closely associated with at least one first substrate, the first substrate having an indicator area comprising a chromogenic composition, the chromogenic composition comprising (a) the colored reaction product of a chromogen and a color developer, the colored reaction product being capable of changing color when exposed to ultraviolet radiation, or (b) a substantially colorless mixture of a chromogen and a color developer capable of reacting to form color when exposed to ultraviolet radiation, the second substrate bearing a reference color chart, the reference color chart comprising at least one reference color corresponding to time exposure to ultraviolet radiation, such that comparison of the color developed by the chromogenic composition upon exposure to ultraviolet light with a reference color provides an indication of the time and degree of exposure to ultraviolet radiation.
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Chang John C. H.
Hoffmann Donald J.
Fields Carolyn E.
Wallace Computer Services Inc.
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