Industrial Pass/Fail Colour Matching Part 1‐Preparation of Visual Colour‐matching Data

The preparation of a comprehensive set of visual colour–difference pairs covering 640 samples grouped around 55 colour centres uniformly distributed throughout colour space is described. 25, 590 pass/fail decisions of a panel of eight observers are analysed to provide acceptability ratings for each of the sample pairs. The data also provide information on the within– and between–observer errors and the reproducibility of the panel. The experiment provides a useful data set for the evaluation of colour–difference formulae.