Why are different standard solutions required when measuring the colority of various substances?
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Different substances require different standard solutions when measuring colority. Why?
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There are multiple different standards for chromaticity, and these standards are applied to various products in different fields. Therefore, to determine the chromaticity of a specific product, it is necessary to be able to accurately measure the color as perceived by the human eye under visible light; for this purpose, standard solutions that represent colors closest to those of the sample being measured are required. This is the main reason. When formulating the components of such a standard color solution, the stability of the color and the reproducibility during the preparation process must also be taken into account. The chromaticity standards that I am aware of include the following: CIE chromaticity, ASTM chromaticity, Gardner chromaticity, and APHA chromaticity