Patent ID: 6043894
Filing Date: 2000-03-28
Classification: G01J

Abstract:
A method for maintaining substantial reliability of color measurements generated by a number of color measuring instruments comprising:(a) measuring color values of a set of master color standards on a master color measuring instrument at a master color lab;(b) measuring color values of a set of working color standards on said master color measuring instrument to determine calibration values based upon the deviation in values determined for said working set from the values determined for said set of master color standards;(c) providing said set of working color standards to a remote location for use on a remote color measuring instrument at said remote location;(d) measuring said set of working color standards on said remote color measuring instrument to obtain color value measurements therefor;(e) transmitting said color value measurements obtained by said remote color measuring instrument to said master color lab;(f) comparing at said master color lab measurements from said remote color measuring instrument with the calibration values obtained from measurements on said master color measuring instrument for said set of working color standards to generate a remote instrument measurement profile reflecting the variations in measurements attributable to said remote color measuring instrument;(g) providing said remote instrument measurement profile to said remote color lab;(h) measuring color values for said set of working color standards and applying said remote instrument measurement profile to said measured color values to provide corrected color values;(i) transmitting said corrected color values to said master color lab; and(j) analyzing said corrected color values to determine compliance with specifications as to permissible deviations.