因光源、照度及环境之不同，使产品在配色、对色上，难以一致或发生色彩判断错误，本机经特别设计而能提供标准、客观的光度，使原料、产品色彩之品管及比对，得以精确控制。 Due to the different light source, illumination, it is not easily to get an uniform environment for users to make accurate color decisions. It is the tool for evaluating color quality and uniformity. It is designed with five different light sources to provide users a standard illumination to detect metamerism.