Malic Acid
Malic Acid
Malic acid (C₄H₆O₅) refers to a naturally occurring organic acid in wine grapes, primarily found in unripe grapes or cool climate berries. It gives wines a sharp, green apple like acidity, tartness and freshness. It is very important in crisp white wines like Sauvignon Blanc and Riesling, but winemakers convert it to softer lactic acids in red wines during the process of malolactic fermentation. Sometimes, producers add malic acid powder to boost acidity in overripe grapes.
See Also
Fermentation
Fermentation is a natural biochemichal process where yeast consumes the natural sugars in grape juice and converts them into alcohol, carbon dioxide and heat. At the end of fermentation, grape juice is converted into wine.
Harvest
The harvest marks the end of the vine growing cycle, typically occuring between August and October in the Northern hemisphere. It is the stage where ripe grapes are picked from the vineyard to begin winemaking.
Aging
Aging is a post fermentation process where wine rests in barrels (mainly oak) or bottles to undergo chemical changes that improves stability, develops complex flavors and clarifies the liquid.
Maceration
Maceration in wine is the process of soaking crushed grape skins, seeds and stems in the juice (must) to extract color, tannins and aroma compounds.
Lactic Acid
Lactic acid is a soft organic acid produced during malolactic fermentation of wines. It smoothens the wine's total acidity, increases pH and adds creamy, buttery or velvety textures and flavors.
Irrigation
Irrigation is the artificial application of water to vineyards to provide the necessary 25-35 inches of annual water in dry climates.
Oak
Oak imparts flavor, aroma and texture into wines through fermentation in oak barrels. These barrels act as gentle, breathable vessels that add complex notes and improve the wine's overall structure and mouthfeel.
Crush
The Crush refers to the period in late summer or fall when harvested grapes are mechanically broken to rupture their skins and release the juice, initiating the winemaking process.