<P> Red drupe grapes can produce white wine if they are quickly pressed and the juice not allowed to be in contact with the skins . The color is mainly due to plant pigments , notably phenolic compounds ( anthocyanidins , tannins , etc . ) . The color depends on the presence of acids in the wine . It is altered with wine aging by reactions between different active molecules present in the wine , these reactions generally giving rise to a browning of the wine , leading from red to a more tawny color . The use of a wooden barrel ( generally oak barrels ) in aging also affects the color of the wine . </P>
<P> Red drupe grapes can produce white wine if they are quickly pressed and the juice not allowed to be in contact with the skins . The color is mainly due to plant pigments , notably phenolic compounds ( anthocyanidins , tannins , etc . ) . The color depends on the presence of acids in the wine . It is altered with wine aging by reactions between different active molecules present in the wine , these reactions generally giving rise to a browning of the wine , leading from red to a more tawny color . The use of a wooden barrel ( generally oak barrels ) in aging also affects the color of the wine . </P>
where do the tannins in wine come from
where do the tannins in wine come from
plant pigments phenolic compounds
plant pigments phenolic compounds