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Method for Detecting Vapor and Liquid Reactants

Abstract: 

A paint or coating composition and method for detecting vapor or liquid reactants, such as ammonia. The composition is composed of ethyl cellulose as a binder, a filler, such as amorphous silica, and a dye, such as bromophenol blue. The composition serves as a passive detector for vapor or liquid reactants when applied to selected surfaces as a paint. The composition is capable of detecting extremely low concentrations of vapor. Further, the composition is capable of regenerating to its original color, thereby providing repeated detection capability.

Patent Number: 
5,322,797
Date Of Issue: 
06/21/1994
Inventors: 

William A. Mallow;Jerome J. Dzuik, Jr.