A METHOD TO SPECIFY ACCEPTABLE SURFACE APPEARANCE OF A COATED ARTICLE

摘要

Disclosed herein is a method for selecting and specifying an appearance of a surface of a coated article, such as an automobile or truck body, comprising the steps of preparing a group of samples of coated substrate using a variety of coating compositions or a range of variations of process application conditions; measuring at least two different appearance characteristic values of each sample; selecting from the group of samples, samples that cover the full range of coating surface appearance; determining from the appearance characteristic values of the selected samples, human visual perception differences data using Multi-Dimensional Scaling and forming spatial organization of the data describing the human visual perception differences and from the spatial organization of the data determining an optimum number of visual perception dimensions required to describe the surface appearance; relating the optimum number of visual perception dimensions to the measured appearance characteristic values,- and setting acceptable appearance characteristic values and process performance requirements to achieve such values in units of multi-dimensional perception space for a coated substrate.