Discussion on the Condition of Deep Red wine Production

color is an important indicator of the sensory quality of wine.How to produce the deep red wine is the key technology of wine brewing to be notified.The coloring materials of red wine are anthocyanins in grape berries.The concentration and composition of anthocyanins determine the chroma and stability of red wine.The chroma of the red wine are affected by various factors,such as the variety and maturity of grapes,the yeast,fermentation technology,equipments,peel and residue separation.The analysis and investigation of the factors that affect the color of the red wine were carried out.The improved methods and suggestions were proposed.