Now paper cups, although some have QS certificates, but it is inevitable to steal beams and change pillars, fish eyes and beads, first teach consumers a set of methods to diagnose the quality of paper cups - looking, smelling, asking and cutting four diagnostic methods, I hope you can buy paper cups in the supermarket or can be used in real life.
Stunt 1: Hope, too white, beware of cell abnormalities! Paper cups that are too white cannot be bought, because they are added with fluorescent brighteners, and fluorescent brighteners can make cells abnormal. Some companies use refurbished paper to make paper cups, and fluorescent brighteners will be used in production to make the paper white; some are ingenious, the inner and outer layers of the paper cup are made of 100% virgin wood pulp materials, but the interlayer is made of refurbished paper.
Stunt 2: Smell of ink, heavy metals exceed the standard, can smell the odor, especially the smell of ink paper cups should not be used. Paper cups with a strong ink smell generally have excessive heavy metal content. In addition, it is not good to have a paper cup with a pattern close to the mouth of the cup, because you will drink the ink with it when you drink water.
Stunt 3: Q. Too cheap, or be careful! Have a basic concept in mind--- there are QS certified paper cups, 50 are sold for about 8 yuan; without Q S certification, the price of 100 is about 10 yuan; 100% paper cups made of raw wood pulp materials are the best, but the price is also higher. The product packaging will generally indicate the name of the manufacturer, address, production date, expiration date, etc. If you are too lazy to look at the packaging, you can also ask more about the precautions in the process of use and other contents that will not be marked on the product packaging.
Stunt 4: Cut out the powder and coat the wax cup! The paper cup sold on the market is generally made by two processes: wax coating and coating. When you pick the inner wall of the waxed paper cup with your fingers, the powder will fall, which is not the case with the coated paper cup. Waxed paper cups can only be used to drink cold water, and if they are filled with hot water, the wax applied to the surface will be dissolved, and harmful substances will be produced. Only coated paper cups can be filled with hot water to drink, of course, you should also pay attention to the temperature should not be too high.
Stunt 5: Bake and shrink up by heat, and coat the film cup! When buying a paper cup, you can ask for a sample, and then use a lighter to bake the inner wall of the paper cup sample. If the material is heated and "runs" to both sides, the paper cup is made by wax coating process, and if the material is concentrated and wrinkled together after heating, the paper cup is a coated paper cup.