The ingredients used in Walnut Dew, Almond Dew and Peanut Dew are walnuts, almonds and peanut rice. These things are rich in protein and fat, solubility is not 100%, especially after cooling, the surface will have some white suspension. Generally speaking, the higher the concentration the thicker the surface white material.

Can make a small experiment: we use a small soybean milk machine to make soybean milk, drink not finished into the refrigerator. After a while to take out is a chilled drink. We will find a thick layer of white material floating on top. This is not spoiled, but solidified.

The difference between the deterioration of a standard: the above said after the cold solidification of white suspension, but the soy milk or walnut dew should still be white, is "emulsion" state, which is normal; if the walnut dew itself becomes like water, poured into a bowl can be seen to have precipitation, it is usually said that the "separation of water and milk". "water-emulsion separation", when serious, you can also smell the rancid flavor, which is spoiled. Should be discarded do not eat.