A clear appearance and the absence of haze are some of most
important attributes for a white wine. A proper handling and settling
of musts during pre-fermentative phases of winemaking can
limit and/or avoid factors contributing to brown and haze of future
white wine limiting oxidation and removing hazing material such
as pectins, gums and proteins from musts. After grape crushing
various reactions occurred, the most important are oxidations
due to the enzyme-catalyzed oxidation of hydroxycinnamates
(HCA) to correspondent quinones, which determine changes in
tone and color intensity responsible for must browning