Abstract
Paint quality is colour quality. We specify colour in terms of three numbers (X, Y, Z) and closeness of the match is described in a single number (∆E). A colour computer system is used for quality control of colour, formulation, production batch correction and quantifying colour related properties such as whiteness and yellowness indices, opacity, contrast ratio, pigment load and hiding power. Preparing a good sample for colour measurement is very important and internet based colour management systems were recently introduced for point-of-sales and are operating successfully. A non-contact spectrophotometer for wet paint colour matching and a multi-angle spectrophotometer for matching metallic in automotive paints are now available.
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