许多行业采用着色工艺来提供旨在增强颜色一致性、颜色识别或审美吸引力的产品。生产商必须交付所需颜色的产品，其变化控制在适合产品使用和客户期望的范围内。颜色测量和色差评估是帮助制造商通过高效的颜色生产流程实现这些目标的基本工具。色差评估模型已经并将继续发展。CIE通过其技术委员会定期制定色差评估的推荐实践，以促进行业实践的一致性。CIE关于这个问题的上一次建议是在1978年提出的。此后积累的研究表明，现在可以识别出与视觉颜色更一致的模型- 不同的判断。介绍了工业色差评估的推荐实施规程。推荐的模型是CIE 1976（L*a*b*）色差模型的扩展，用于校正色差感知中的色度依赖性变化。参考条件定义了色差模型适用的材料和观察环境特征。引入了校正各种使用条件的参数效应的因素。为色差感知的进一步研究提供了指导。本技术报告以英文书写，并附有法文和德文摘要，共20页。

Many industries employ colouring processes to provide products designed to enhance colour uniformity, colour recognition or aesthetic appeal. The producer must deliver a product of the desired colour with its variation controlled to an extent appropriate for the product's use and the customer's expectations. Colour measurement and colour-difference evaluation are essential tools to help manufacturers accomplish these goals with efficient colour production processes.Colour-difference evaluation models have been, and continue to be, developed. The CIE, through its technical committees, has periodically established recommended practices for colour-difference evaluation to promote uniformity of industrial practice. The last CIE recommendation on this subject was made in 1978. Accumulated research since then indicates it is now possible to identify a model with improved agreement with visual colour-difference judgements.Recommended practice for industrial colour-difference evaluation is presented. The recommended model is an extension of the CIE 1976 (L*a*b*) colour-difference model with correction for chroma-dependent variation in colour-difference perception. Reference conditions define material and viewing environment characteristics to which the colour-difference model applies. Factors are introduced to correct for the parametric effects of various conditions of use. Guidelines for further research on colour-difference perception are given.This Technical Report is written in English, with a short summary in French and German, and contains 20 pages.