Patent ID: 9734590
Date: 2017-08-15
CPC Classifications: G01J,G01N,G06T

Claim:
1. A process for producing a total match metric for matching color and appearance of a target coating and at least a specimen coating, the process comprising the steps of: A0) measuring a specimen color data and a specimen sparkle data from a specimen coating having a specimen coating composition, and saving said specimen color data and specimen sparkle data with a specimen coating formulation in a color database; A1) obtaining target color data of the target coating and said specimen color data of the specimen coating produced from the specimen coating composition, wherein the target color data comprise target color values measured at three or more color viewing angles and the specimen color data comprise specimen color data values measured at the three or more color viewing angles, and wherein the specimen color data is obtained from the color database; A2) producing color difference values (ΔE) at each of the color viewing angles based on the target color data and the specimen color data values at each of the color viewing angles; A3) obtaining target sparkle data of the target coating and said specimen sparkle data of the specimen coating, wherein the target sparkle data comprise target sparkle values measured at one or more sparkle viewing angles and the specimen sparkle data comprise specimen sparkle values measured at the one or more sparkle viewing angles, and wherein the specimen sparkle data is obtained from the color database; A4) producing sparkle difference values (ΔS) at each of the sparkle viewing angles based on the target sparkle data and the specimen sparkle data at each of the sparkle viewing angles; A5) generating target flop data (f A6) producing a flop difference value (Δf) based on the target flop data and the specimen flop data; and A7) producing the total match metric (TMM) of the target coating and the specimen coating based on the color difference values (ΔE), the sparkle difference values (ΔS) and the flop difference value (Δf).