Nowadays, cling film is more and more widely used in daily life. People habitually use plastic wrap to wrap food and put it in the refrigerator, believing that this can lock in nutrients and extend the shelf life. However, if the plastic wrap is not selected or used correctly, it will endanger human health. The following briefly introduces how to select the plastic wrap.
Three ways to buy plastic wrap safely:
Take a look: Check if it has a product description. If it is marked with PE cling film or polyethylene cling film, you can use it with confidence.
Second touch: The viscosity and transparency of polyethylene cling film are generally poor and easy to open after rubbing by hand; while the transparency and viscosity of polyvinyl chloride cling film are better, it is not easy to spread after rubbing by hand and is easy to stick to your hands.
Three burning: Use fire to ignite the polyethylene cling film, the flame is yellow, it will not go out even if you leave the fire source, there will be oil dripping, and there is no pungent smell.
Precautions for using plastic wrap in the microwave oven:
1. When heating oily food, please keep the plastic wrap and the food in a state of isolation, and do not directly contact the two. Because when heating food, food oil may reach a very high temperature, causing the plastic wrap to break and stick to the food.
2. When heating food, first cover the utensils with plastic wrap, and then use a toothpick to pierce a few small holes in the plastic wrap. This will help water evaporate and prevent the plastic wrap from rupturing due to gas expansion.
3. On the plastic wrap of each brand, the maximum heat-resistant temperature marked is different, some temperature difference is about 10°. When the temperature in the microwave oven is high, the temperature can usually reach 110°. If you need to heat for a long time, you can choose a plastic wrap with higher heat resistance.