Method for estimating the quality of distribution of pigments in a matrix
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United States of America Patent
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Oct 21, 2003
Grant Date -
Apr 25, 2002
app pub date -
Aug 17, 2001
filing date -
Sep 1, 2000
priority date (Note) -
Expired
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Abstract
The quality of distribution of pigments in a matrix is estimated by measuring the reflectivity of a sample of the pigmented matrix at a shorter and a longer wavelength, and calculating a function of the two measurements. A ratio of the normalized reflectivity for broad short and long wavelength bands is the preferred function.
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