Patent ID: 6362885
Filing Date: 2002-03-26
Classification: G01J

Abstract:
A method for determining a formulating ratio of at least one colorant inclusive of a translucent pigment to at least one effect material like metallic or pearlescent pigment in a computer color matching of a coating composition containing said at least one effect material comprising the steps of:measuring spectral reflectances of a plurality of coated plate specimens of varied formulating ratios of the at least one colorant to the at least one effect material to be used; storing the resulting data in a memory of a computer in advance; and executing an algorithm for predicting reproduction goniospectral reflectances of a target color using measured spectral reflectances from the plurality of coated plate specimens representing differences in gonio-spectral reflectances caused by varying formulating ratios of the at least one colorant to said at least one effect material to find an adequate formulating ratio of the at least one colorant to said at least one effect material.