Rumor: Look at the flame color of liquor burning. Blue flame is the symbol of good wine, and yellow flame is the characteristic of inferior liquor.
Truth: Sun said that the color of liquor flame is mainly determined by two factors. First, the temperature of the flame determines the color of the flame, and the flame is a reaction. When the temperature is low, it is infrared. With the increase of temperature, the flame changes from red-orange to yellow-white, then to cyan, then to purple, and finally to invisible ultraviolet rays. Secondly, the elements of gaseous and plasma substances constitute a fixed spectrum that determines the flame, and each element in the element list will emit its own specific light color at high temperature. The main components of wine are water and ethanol, among which ethanol is the main combustible, which determines that the burning flame generally appears blue and yellow from the inside out. Therefore, the quality of liquor cannot be identified by the flame color.