In order to make people try to avoid the use of substandard products, experts give tips for identifying inferior products:
Fast food box: In general, qualified products have good finish and brightness, and they have a certain amount of strength when squeezed. Tears do not tear, and they smell nothing. The poor quality lunch box, soft to the touch, has no elasticity, and tears when it breaks lightly, smelling a pungent smell.
In addition to the above methods of identification, submerged experiments can also be used to verify the pros and cons of fast food boxes: Inferior products generally include cheaper minerals such as calcium carbonate, talcum powder, with a higher specific gravity than water, and the snack box is broken into water. Stirring, sinking is unqualified, while the proportion of qualified fast food boxes will be on the surface.
Plastic bags: Generally inferior plastic bags have two main characteristics. First, there are many impurities. Looking at the light, there are a lot of black spots or impurities inside, which are generally produced with waste plastics; the second is the taste of smell, poor quality The plastic bag smelled a lot of pungent odor.
In addition, consumers at home can also use cotton balls dipped in some edible oil, wipe in colored plastic bags, easy to decolorize is a poor plastic bag.
Fresh-keeping film: The plastic wrap made of PE material can be used safely, and the cling film made of PVC material should not be exposed to grease or heated, and should be used with caution. Through the burning method can identify the two kinds of cling film: In the process of burning, if the drop of oil, smoke is relatively small PE cling film, smoke is relatively large, non-dripping PVC cling film.
