Patent ID: 8771784

Claim:
A method for producing a coating having a target gloss value on a substrate, said coating is formed from a coating composition and a matting agent, said method comprising steps of: a) obtaining a gloss-mixing ratio correlation data system that comprises correlations of gloss values to mixing ratios of said matting agent and said coating composition; b) generating a target mixing ratio of said matting agent and said coating composition according to said target gloss value and said gloss-mixing ratio correlation data system; c) producing a coating mixture comprising said coating composition and said matting agent having said target mixing ratio; and d) producing said coating by applying said coating mixture over said substrate, wherein said gloss-mixing ratio correlation data system is generated by a fitting process comprising the steps of: i) producing a first coating mixture comprising said coating composition and said matting went according to a first mixing ratio x 1 , applying the first coating mixture over a first substrate and allowing the first coating mixture to dry forming a dry first coating, and measuring a first gloss value y 1 of the dry first coating; ii) producing a second coating mixture comprising said coating composition and said matting agent according to a second mixing ratio x 2 , applying the second coating mixture over a second substrate and allowing the second coating mixture to dry forming a dry second coating, and measuring a second gloss value y 2 of the dry second coating; iii) repeating the steps i) and ii) above for subsequent mixing ratios x 3 through x n , and measuring subsequent gloss values y 3 through y n ; and iv) generating said gloss-mixing ratio correlation data system by fitting the mixing ratios) x 1 through x n and the gloss values y 1 through y n ; wherein, n is an integer equal to or greater than 3, and said gloss-mixing ratio correlation data system has a correlation coefficient R 2 equal to or greater than 0.7, and wherein said gloss-mixing ratio correlation data system is expressed as a 2-degree polynomial fitting equation: y=a 1 x 2 +a 2 x+a 3 (1) wherein is a gloss value, x is a mixing ratio a 1 , a 2 and a 3 are constants determined through fitting said mixing ratios x 1 through x n and said gloss values y 1 through y n .