MAY 4-5, 2021 | Online Event
    ENOFORUM, the largest technical-specific wine industry event in Europe, takes place every other year attracting over 2,000 attendees from Italy, Spain, and Portugal and brings together over 1,900 t...
    Published on: 03/01/2021

Colour evolution of rose wines after bottling.

Hernandez, B.; Saenz, C.; Alberdi, C.; Alfonso, S.; Dineiro, J. M.; South African Journal of Enology and Viticulture 2011, 32 (1) 42–50

This research reports on colour changes of 6 rose wines during 16 months of storage in the bottle.Colour changes were determined in terms of CIELAB colour parameters and in terms of the common colour categories used in visual assessment. The colour measurement method reproduces the visual assessment conditions during wine tasting with respect to wine sampler, illuminating source, observing background and sample-observer geometry. CIELAB L*, a*, b*, C* and hab colour coordinates were determined at 7 times (t = 0, 20, 80, 153, 217, 300 and 473 days). The time evolution of colour coordinate values was studied using models related to linear, quadratic and exponential rise to a max.. Adjusted R2, average standard error and CIELAB .E* colour difference were used to compare models and evaluate their performance. For each colour coordinate, the accuracy of model predictions was similar to the standard deviation associated with a single measurement. An average .E* = 0.92 with a 90 percentile value .E*90% = 1.50 was obtained between measured and predicted colour. These values are smaller than human colour discrimination thresholds. Classification into colour categories at different times depends on the wine sample. It was found that all wines take 3–4 months to change from raspberry to strawberry colour and 7–8 months to reach the redcurrant category. Only 2 wines had developed salmon colour by the end of the experiment. (We recommend that you consult the full text of this article)
Published on 01/15/2013
Related sheets
© All Right Reserved
ISSN 1826-1590 VAT: IT01286830334
powered by Infonet Srl Piacenza
Privacy Policy
This website and its related third-party services make use of cookies necessary for the purposes described in the cookie policy. If you want to learn more about cookies or how to disable them (either totally or partially), please see the cookie policy. By closing this banner, scrolling through this page, clicking on a link or continuing navigation in any other way, you consent to the use of cookies.
More informationOK

- A +
ExecTime : 2,515625