Process for fluorimetric monitoring of functional coatings and compositions and fluorescent agents therefor
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United States of America Patent
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May 1, 1990
Issued Date -
N/A
app pub date -
Mar 7, 1988
filing date -
Jul 10, 1986
priority date (Note) -
Expired
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Abstract
A method for monitoring the coating weight, uniformity, defects or markings present in a coating of a composition applied to a substrate comprises the steps: (a) providing a substrate with a functional coating of a composition comprising an effective amount of uvescer that absorbs radiant energy, i.e., has an excitation energy, of wavelength .xi..sub.1 and emits radiant energy of wavelength .lambda..sub.2 ; (b) scanning the coating with radiant energy having a wavelength within wavelength .lambda..sub.1 ; (c) detecting the radiant energy of wavelength .lambda..sub.2 emitted by the coating; and (d) optionally, correlating the emitted radiant energy to independently measured standard coating weights or thicknesses, of the coating so as to measure coating weight, thickness, uniformity, defects, or markings.
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