Frequent use of inferior paper cups will affect human health. Do you know how to choose a qualified paper cup? Now let me teach you a three-step method for picking paper cups.
The first step is to see if the production license number and QS logo are marked on the packaging. The color of the paper cups should not be too bright. Take a paper cup and look at the light, there should be no impurities. If the paper cup appears blue under fluorescent light, it proves that the fluorescent agent exceeds the standard.
The second step, gently squeeze the sides of the cup with your fingers, you can know the hardness of the paper cup.
The third step, Smell the paper cup with your nose. Poor quality paper cups may smell of ink or mold.
Now do you get how to choose a paper cup?