Now the CIE L * a * b * color space used in the color difference instrument was introduced in 1976, and this CIE color space is the best one in photometry up to now.

1. Color Space: there are five complete color spaces available: CIE X Y Z; CIE Yxy； CIE L * a * b *； CIE L * C * h； and Hunter L a b. Each of these scales consists of three numbers, but each number is determined in a unique way.

The colorimeter is mainly based on its color light ternary principle and complementary color principle to detect the color and control the color quality of the product. None of the three primary colors can be combined with the other two colors. In addition, the three primary colors as the basic colo

Ultra-pure water system can remove impurities in the water, the produced water is with high purity, but ultra-pure water is easy to be polluted. How to ensure water quality in the process of using ultra-pure water machine? It’s very high requirement for ultrapure water storage. Ultrapure water can’t