Web23 apr. 2015 · While the Hunter Whiteness Index works well enough, there are more modern whiteness indices supported by industrial test methods that work just as well or … Web12 jan. 2024 · Richard S. Hunter and Richard W. Harold write: The earliest studies [on quantifying whiteness] merely used average reflectance through the visible spectrum as …
A method for evaluating Hunter whiteness of mixed …
WebAn international method for expressing whiteness. The W value indicates the degree of whiteness, and the T value indicates the tint. Yxy values can also be displayed in CIE … Web8. High whiteness value, the Hunter whiteness is above 70. 9. Whiskering resistant performance is good. 10. Can be mixed with Portland cement in a proper ratio, can … blackbough discount
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WebWhite textiles, paints, and plastics are a few of the materials that can be described by the indices of yellowness or whiteness calculated by this practice. 1.2 For a complete analysis of object colors, by a specified observer and under a specified illuminant, use of three param- eters is required. WebColour is an important quality attribute in the food and bioprocess industries, and it influences consumer’s choice and preferences. Food colour is governed by the chemical, biochemical, microbial and physical changes which occur during growth, maturation, postharvest handling and processing. Web23 apr. 2015 · The more commonly known Hunter Whiteness Index was defined in 1960 based on the Hunter L, a, b scale for C/2 conditions. Hunter Whiteness Index (1942) WI H = 100 – { [220 (G – B) / (G + 0.242 B)] 2 + [ (100 – G)/2] 2 } 1/2 (C/2) Hunter Whiteness Index (1960) WI H = L – 3b (Hunter L, a, b C/2) = 10 (Y – 21) 1/2 (Y – 0.847 Z)Y 1/2 (C/2) black bough limited