Coating is an industrial process that consists of applying a liquid or a powder into the surface of an edible product to convey new (usually sensory) properties. Coating designates an operation as much as the result of it: the application of a layer and the layer itself. Coating takes different meanings depending on the industry concerned. The coating agents are edible, so it is safe. Fruit coated with a thin film that inhibits evaporation, prevents microbial invasion, and forms the gas layer, so it can extend the fruit shelf life. Chocolate and candies with surface coating looks bright. It also prevent adhesions and maintain the stability of its quality. By the way, the coating rice can enhance the nutrition, the coloring and the flavoring in the process, to a certain degree it reduces nutrition loss and has a good fragrant effect. Whether wax will be harmful to the human body? Waxing needs professional production line as well as soaking, cleaning, filtering and many other procedures, thus the cost increases. Generally low prices fruits and vegetables will not waxing, for this increase costs, and only simple hand spraying to realize the waxing is impossible. In addition, some fruits and vegetables such as eggplant, Zucchini, green pepper looks very smooth and bright. But fruit waxing must use the allowed food additives, and add proper amount according to the actual use. Imported fruits or high-end fruits in order to keep fresh will use coating agent, and this edible wax is not digestible. It will not be absorbed and will be excreted even eating. Above all, it do no harmful to health. But the unqualified wax or industry wax applied to fruits and vegetables will do harm to body.
