Environmental quality indicator

Chemistry: physical processes – Physical processes – Crystallization

Patent

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Details

73 27R, 116114AM, 428173, G01N 3100

Patent

active

040921190

ABSTRACT:
A scuff-resistant, waterproof environmental quality indicator suitable for field use to blot-test unknown spills or wet containers, as field markers of spray distribution, as floating markers of water contamination, as personnel protection badges and as integrating dosimeters. The environmental quality indicator has a topographically varying surface having substantially uniformly located raised portions defining the scuffing and abrasion level and relieved portions beneath the scuffing and abrasion level to protect the indicator formulation from physical environmental hazards, which can produce an initial false indication, while remaining freely exposed to chemical environmental hazards.

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