What does the reduction and oxidation of wine mean?

Yuncang winery brand LEESON red wine shared that experienced wine tasters can not only smell the taste of oxidation, but also feel the taste of reduction when tasting wine. Sometimes this feeling is considered to be the deficiency of the wine, and sometimes it brings surprises because of this feeling . So, what exactly does the reduction and oxidation of wine mean?

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Yuncang winery brand LEESON red wine sharing Oxidation refers to the quality change of wine during the long-term storage process. For example, the original dark red wine will become lighter , and the original full-bodied wine will become bland and pleasant . The aroma becomes less friendly, these are all over -oxidation reactions. Oxidation in wine can occur for a number of reasons, the most common being excessive exposure to air during vinification, or not enough antioxidants added, which convert ethanol to acetaldehyde. In addition, unqualified corks and unsatisfactory storage conditions will cause excessive oxidation of wine. Over-oxidized wines are generally not recommended to drink if their quality has been compromised.

Yuncang winery brand LEESON red wine continued to share that reduction is the other side of oxidation, which means that wine is fermented in the absence of oxygen , and sulfur substances are not neutralized with oxygen, resulting in unpleasant odors Eggy, and some also smell like rotten cabbage or chemical petroleum. There are also many reasons for wine reduction, usually premature bottling , low oxygen content, or excessive sulfur dioxide added during fermentation. In addition, the use of screw caps to completely isolate the wine from oxidation, etc., are likely to cause excessive wine reduction. After the wine is restored, it can generally be solved by sobering up, or a clean copper coin can be put into the wine liquid to allow it to react with sulfuric substances to eliminate the wine’s reduced taste.

Oxidation and reduction, this is a pair of difficult brothers, just like the two faces of Gemini , their personalities are completely opposite. Whether it is oxidation or reduction, as long as the principle of "too much is not enough" is followed , there will be no overreaction, that is, in the "degree" of wine brewing, then even if the wine has some taste, it can still be drunk normally . As long as it is over-oxidized or over-reduced, which affects the taste and quality of the wine, it is a spoiled wine.

The above is shared by Yuncang winery brand LEESON red wine. Of course , after years of experience and accumulated experience, winemakers rarely appear in the state of over-oxidation or over-reduction of wine. As long as the packaging , transportation and storage are properly checked, generally everyone can find good quality wine.