Any of several numerical indices used to indicate the degree of whiteness; examples are the following:
- (1)
W = 4B-3G where B and G refer to tristimulus colorimeter readings.
- (2)
W = 100-[(100-L)2 + (a2 + b2)]1/2 where L, a, and b refer to coordinates in Hunter's L, a, b Color Difference Equation.
- (3)
Chemstrand Whiteness Scale W = 10 (Y – 2p2)1/2 where Y is the CIE tristimulus value and p is the CIE excitation purity.
(Colour Physics for Industry, 2 nd Ed., ed., McDonald, Roderick, Society of Dyers and Colourists, West Yorkshire, England, 1997)
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Gooch, J.W. (2011). Whiteness Index. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_12823
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