Colour Evolution of Rosé Wines after Bottling

摘要: This research reports on the colour evolution of six rose wines during sixteen months storage in bottle. Colour changes were determined terms CIELAB parameters and common categories used visual assessment. The measurement method reproduces assessment conditions wine tasting with respect to sampler, illuminating source, observing background sample-observer geometry. L*, a*, b*, C* hab coordinates at seven different times (t = 0, 20, 80, 153, 217, 300 473 days). time coordinate values was studied using models related linear, quadratic exponential rise a maximum. Adjusted R2, average standard error ΔE* difference compare evaluate their performance. For each coordinate, accuracy model predictions similar deviation associated single measurement. An 0.92 90 percentile value ΔE*90% 1.50 obtained between measured predicted colour. These are smaller than human discrimination thresholds. classification into depends sample. It found that all take three four change from raspberry strawberry eight reach redcurrant category. Only two had developed salmon by end experiment.