Five effective methods of identifying non-toxic plastic bags. Eye detection. To see non-toxic plastic bags are milky white, translucent or colorless transparent, flexible and looks like wax light. Hand detection. With hand touch, there is a sense of lubrication, feel the drum. Grab one of the ends of the plastic bag with one hand and shake it vigorously. It is a non-toxic plastic bag. Please feel free to use it. The sound is stuffy, and there is no noise of the plastic bag. It shows that it is poisonous. Please don't use it. Water detection. Press the plastic bag into the water, if the plastic bag can automatically surfaced, the description is non-toxic, can be assured to use, if not floating at the bottom of the water is toxic, please prohibit the use of. Color detection. If you use plastic bags that muddy colors are poisonous, most with the color of the plastic bags to buy old plastic, plastic bags, waste plastics and back to the new, these plastic bags of health standard, is not with food products. External detection. In accordance with state regulations, plastic bags loaded with food "food use" word, if there is no "food used" words, generally substandard products, should be carefully chosen to ensure good health.