For aged red wines, because tannins and pigments will form precipitates during the long aging years, it is unsightly and a little bitter when poured into the glass. Therefore, after opening the bottle, in principle, the wine should be poured into the decanter steadily and slowly, leaving the sediment at the bottom of the bottle. This process is called Decanting, commonly known as "changing bottles."
For light-aged red wine, the opening time of the decanter (including the flow process during injection) can make the wine contact air in a large area (the space and opening of the decanter is larger), thereby accelerating the softening and full release of tannins Closed aroma. This process is called Breathing, commonly known as "breathing". In addition, after "changing bottles" of aged red wines, sommeliers will usually ask customers for their opinions: Do you need to sober up? The purpose is to dissipate the possible sulphur smell as quickly as possible.
