TY - JOUR T1 - Approximation of per cent Brightness and Dominant Wave Length and some Blending Application with Red Wines JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 32 LP - 39 DO - 10.5344/ajev.1962.13.1.32 VL - 13 IS - 1 AU - C. S. Ough AU - H. W. Berg AU - C. O. Chichester Y1 - 1962/01/01 UR - http://www.ajevonline.org/content/13/1/32.abstract N2 - Estimation of the per cent brightness of a red wine by use of the sum of the optical densities at 420 and 520 mµ will usually give values witin 1 to 3 per cent of the calculated value.Estimation of the dominant wavelength to an accuracy of ± 3 mµ can be made from a plot of the ratio of the optical densities (420/520 mµ) versus dominant wavelength between 590 and 630 mµ.Close color marches with a standard can be achieved only when the component wines of the blend have nearly the same dominant wavelengths. With wines of dissimiar dominant wavelengths adjustments must be made to a trial blend to attain a satisfactory color match. ER -