Colorimetry, pigments

Osorio, C. et al., Application of tristimulus colorimetry to obtain natural additives from fruits. 1. Color evaluation during osmotic dehydration, in Proceedings of 4th International Congress on Pigments in Food, Hohenheim, Germany, Carle, R. et al., Eds., Shaker Verlag, Aachen, 2006, Yll. 

Colorants and pigments, in meats Color density, see also Colorimetry Colorimetry, see also Color analysis amylose, 689-692... 

Ahn and Kim [10] used colorimetry to assess the whitening effect of biweekly 30% salicylic acid peels in Korean patients with acne and post-inflammatory pigmentation. After 3 months, there were significant improvements in colorimettic parameters, reflecting a reduction in hyperpigmentation. 

Jacobsen, A. E. 1948. Non-adaptability of the ICI system to some near whites which show absorption in the far blue region of the spectrum. J. Opt. Soc. Amer. 38, 442. Judd, D. B. 1949. A comparison of direct colorimetry of titanium pigments with their indirect colorimetry based upon spectrophotometry and a standard observer. J. Opt. Soc. Amer. 39, 945. 

Beside visual assessment, the color of an object can be characterized more precisely in terms of mathematical models, which are based on the remission and transmission spectra in the visible light area [6]. The most common CIELAB system, defines a color space and allows one to describe a specific color in terms of L (lightness) and the color coordinates a and b, and color differences or tolerances by related AL, A Ab and a combined AE value. L, a, b, values can be transformed into the probably more convenient terms of L (lightness), h (hue) and c (chroma). Today, colorimetry software is used for color matching and allows very precise calculations of pigment formulations. 

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