4 Questions 3 Answers 0 Followers
Questions related from Guo Ying
The color matching method is very common in the process of gemstone color evaluation, using master stone or standard color card. When the luster of gemstone is obviously different from that of...
20 July 2019 953 2 View
Observing the same gemstone material under the same light source and different backgrounds, the color observed by the naked eye is different. For transparent gemstones, the background color passes...
03 April 2019 5,402 0 View
When using X-rite Color i5 to measure the color of samples, there will be several groups of data under different light sources shown on the instrument. Since the testing area is an enclosed...
27 January 2019 7,571 2 View
CIE DE2000 (ΔE00) formula, which recommended by Commission Internationale de L'Eclairage (CIE). It's widely used around the world. How to understand it and use it properly?
14 December 2018 5,718 4 View
