Look at the thickness of the plastic bag. According to the state regulations, the thickness of plastic bags circulating on the market cannot be less than 0.025 mm. Most custom-made plastic bags on the market will also be marked with thickness. Generally speaking, the thickness of the plastic bags used in supermarkets is basically higher than the national standard. But in fact, some merchants will also work on the thickness scale in order to sell products that are not up to standard. Therefore, before purchasing a plastic bag, use a thickness gauge to measure the actual thickness of the product.
First, see if the plastic bag ink is toxic. Customized plastic bags In the process of printing, the choice of which ink will have a great impact on the environment. Toxic inks are prone to fading after exposure to cooking oil. Therefore, before purchasing a plastic bag with printed lettering, it is possible to test whether the printing ink is environmentally friendly by applying oil. In addition, colored plastic bags cannot be used as food plastic bags, which contain aromatic hydrocarbons and are carcinogenic.
Second, look at the load-bearing capacity of plastic bags. At present, the state stipulates that custom-made plastic bags must be marked with their own load-bearing capacity, but in the sales market, there are still a large number of plastic bag products that are not marked with load-bearing capacity. The simple test method is to use a plastic bag to load a certain weight of the product, walk around the plastic bag, and see how long the bag can last. This test is more troublesome, so why should the buyer pay attention to the bearing capacity of the plastic bag? This is because a plastic bag product with poor bearing capacity often breaks during use, which increases the amount of use of plastic bags by customers and causes waste.
Third, to do the incineration experiment. The raw materials of the customized plastic bags directly determine the quality of the plastic bags. The bags made from food-grade raw materials are environmentally friendly, and the plastic bags made of waste materials and waste materials are low in production cost and have certain toxicity. Ignite a plastic bag and wait until it is naturally extinguished. Observe whether black smoke or pungent odor is generated before and after burning. If any black matter is left, if any of the above three items are met, the plastic bag used in the experiment is likely to be Made of waste.