The visual impression comes first. You recognize whether it is a glass of red or white wine, or a rose. The hue depends on the variety of grapes, development and the ground conditions. The intensity of color depends on age. While white wines darken with age, red wines gradually lose their dark color.
||Wine must be clear and should not be cloudy.|
Depot is sediment on the bottom of the red wine bottle, but is a sign of quality.
A shimmer or streak on the glass is also a sign of good quality and shows the glycerine content.