The aging of wine is potentially able to improve the quality of wine. This distinguishes wine from most other consumable goods. While wine is perishable and capable of deteriorating, complex chemical reactions involving a wine's sugars, acids and phenolic compounds (such as tannins) can alter the aroma, color, mouthfeel and taste of the wine in a way that may be more pleasing to the taster. The ability of a wine to age is influenced by many factors including grape variety, vintage, viticultural practices, wine region and winemaking style. The condition that the wine is kept in after bottling can also influence how well a wine ages and may require significant time and financial investment. The quality of an aged wine varies significantly bottle by bottle, depending on the conditions under which it was stored and the condition of the bottle and cork. Thus it is said that rather than good old vintages, there are good old bottles. There is a significant mystique around the aging of wine, as its chemistry was not understood for a long time, and old wines are often sold for extraordinary prices. However, the vast majority of wine is not aged, and even wine that is aged is rarely aged for long; it is estimated that 90% of wine is meant to be consumed within a year of production, and 99% of wine within 5 years.
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Maturation (wine) in the context of Huangjiu
Huangjiu (Chinese: 黃酒; lit. 'yellow wine') is a type of Chinese rice wine (mijiu) most popular in the Jiangnan area. Huangjiu is brewed by mixing steamed grains including rice, glutinous rice or millet with qū as starter culture, followed by saccharification and fermentation at around 13–18 °C (55–64 °F) for fortnights. Its alcohol content is typically 8% to 20%.
Huangjiu is usually pasteurized, aged, and filtered before its final bottling for sale to consumers. The maturation process can be complicated but important for the development of the layers of flavors and fragrance. A few brands of premium grade huangjiu could have been aged for up to 20 years. As huangjiu's name suggests, its typical color is typically light yellow and orange, but it can in fact range from clear to brown. Many famous huangjiu brands promote the quality of water used in brewing in their advertising, and some consider it to be the most important ingredient.
View the full Wikipedia page for Huangjiu