Three direction measurements for characterization of a surface containing metallic particles
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United States of America Patent
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Oct 30, 1984
Grant Date -
N/A
app pub date -
Jun 17, 1982
filing date -
Jun 17, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved method for instrumentally characterizing the optical properties of a surface containing metallic particles such as a paint containing metallic flakes by using multiangular spectrophotometric or colormetric measurements to derive color constants for the paint, wherein the improvement comprises using three multiangular measurements, preferably 15.degree., 45.degree. and 110.degree. as measured from the specular angle.
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