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From a physical point of view, plastic wrap has moderate oxygen permeability and humidity permeability, which regulates the oxygen content and moisture content around the preserved product, blocks the dust in the air, and prolongs the shelf life of food. Therefore, it is necessary to choose different plastic wraps for different foods.
At present, the plastic wrap on the market is roughly divided into two categories, one is ordinary plastic wrap, which is suitable for refrigerator preservation; One is microwave wrap, which can be used for both refrigerator and microwave ovens. The latter kind of plastic wrap is far superior to ordinary plastic wrap in terms of heat resistance and non-toxicity. Therefore, consumers should pay special attention to the choice of use and use itemized.
In addition, care should also be taken when using microwave plastic wrap:
1.When heating oily food, keep the plastic wrap and food in isolation and do not allow direct contact between the two. When food is heated, the oil may reach a very high temperature, causing the plastic wrap to break and stick to the food.
2.When heating food, the utensils should be covered with plastic wrap, and then a few small holes should be pierced in the plastic wrap with toothpicks and other needles to facilitate the evaporation of water and prevent the plastic wrap from bursting due to gas expansion.
3.The maximum heat-resistant temperature marked by each brand of plastic wrap is different, some are about 10 different, and the temperature in the microwave oven will generally reach about 110 when it is high.
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There is a trick to thawing meat in the microwave, add some of this before thawing, save worry and effort.
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In general, hot dishes in the microwave oven should not be wrapped in plastic wrap.
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It depends. Generally speaking, if you heat ordinary vegetables, you don't need to add plastic wrap, because vegetables contain water; If the leftovers are hot, it is best to add a layer of plastic wrap, as this will not harden the rice on the surface; If it is hot meat food, it is best to add a special plastic cover, because the grease on the surface of the meat will fry when heated during the heating process, and it is easy to make the microwave oven liner be fried to the ground without a cover.
from food safety.
From the point of view, the heat resistance of the plastic wrap commonly used in the general family is not strong, and the food is heated, and the oil in the food is easy to be the plasticizer in the plastic wrap.
and other harmful substances are dissolved.
However, from the perspective of safety of electrical appliances, if you do not cover the plastic wrap, the water vapor and the oil in the stir-fry will pollute the inner wall of the microwave oven after evaporation, and in severe cases, too much oil will accumulate on the inner wall and cause fire. Therefore, when hot dishes, especially dishes with soup, it is best to cover the microwave oven with a glass lid, so as to avoid unnecessary troubles such as a short circuit in the microwave oven circuit caused by too much water vapor.
1.Do not heat meat until it is half cooked and then microwave it.
Because bacteria still grow in half-cooked food, it is impossible to kill all the bacteria when it is heated in the microwave for the second time due to the short time. Frozen meat products should be thawed in the microwave before being reheated to cooked food.
2.Do not refreeze meat that has been thawed in the microwave.
Because after the meat is thawed in the microwave, the outer layer is actually heated at a low temperature, at which the bacteria can multiply, and although refreezing can stop the reproduction, it cannot kill the live bacteria. Meat that has been thawed in the microwave must be heated until fully cooked if it is re-frozen.
3.Avoid fried foods.
Due to the high temperature, the oil will splash and cause a fire. If it accidentally causes the furnace, do not open the door, but turn off the power first, and then open the door to cool down after the fire is extinguished.
4.Do not overheat.
5.Do not use ordinary plastic containers.
Use a special microwave oven to hold food and heat it in the microwave oven, one is that hot food will deform the plastic container, and the other is that ordinary plastic will release substances that will pollute food and endanger human health.
6.Do not use metal utensils.
Because of the iron, aluminum, stainless steel, enamel put into the furnace.
When the microwave oven is heated, it will generate electric sparks and reflect microwaves, which will not only damage the furnace body but also heat undercooked food.
7.Do not use closed containers.
When heating liquids, a wide-mouth container should be used, because the heat generated by food heating in a closed container is not easy to dissipate, so that the pressure in the container is too high, which is easy to cause a blasting accident. Even when frying food with shells, use a needle or chopsticks to puncture the shell beforehand to avoid bursting, splashing and staining the walls of the oven after heating, or splashing and injuring people.
Put the food in the microwave oven to thaw or heat, if you forget to take it out, if the time is more than 2 hours, you should throw it away, so as not to cause it in the food.
8.Do not stay near the microwave oven for long periods of time.
After turning on the microwave oven, people should stay away from the microwave oven or at least 1 meter away from the microwave oven.
9.Do not leave the microwave oven in the bedroom.
Care should also be taken not to cover the heat dissipation grilles on the microwave oven with objects.
10.Do not microwave the oven and start the microwave oven before putting in the food.
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In the process of heating food in the microwave oven, the food will release a certain amount of heat, and after the heat reaches a certain value, a part of the plastic wrap will be dissolved, so that the plastic wrap will release harmful substances, so the microwave oven heating plastic wrap should be removed.
How does a microwave oven work:
A microwave oven is a cooking appliance that uses food to absorb microwave energy in the microwave field to heat itself. The microwave generated by the microwave generator in the microwave oven establishes a microwave electric field in the microwave oven cavity, and takes certain measures to make this microwave electric field distributed as evenly as possible in the furnace cavity, puts the food into the microwave electric field, and controls its cooking time and microwave electric field intensity by the control center to carry out various cooking processes.
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Compared with ordinary plastic wrap, microwave oven plastic wrap is more non-toxic, but it is also necessary to pay attention when using it, it is best not to heat it in direct contact with oily food, because the temperature of the oil is very high after heating, which is easy to make the plastic wrap stick to the food; In addition, even if it is a special plastic wrap for microwave ovens, it should not be heated for too long; Finally, it is best to buy special plastic wrap for microwave ovens through formal channels, such as Kelip**, which can ensure the direct supply of the manufacturer's platform, its safety is more reassuring.
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It depends. Heat vegetables without plastic wrap; To heat leftovers, you need plastic wrap (for microwave ovens) to keep the rice from being tough; To heat meat, you need plastic wrap (for microwave ovens), because during the heating process, the fat on the surface of the meat will be fried when heated, and the microwave oven liner is easy to be broken without plastic wrap. <
It depends. Heat vegetables without plastic wrap; To heat leftovers, you need plastic wrap to keep the rice from hardening; To heat meat, you need special plastic wrap for microwave ovens, because during the heating process, the grease on the surface of the meat stool will fry when heated, and it is easy to break the inner liner of the microwave oven without plastic wrap.
A microwave oven is a household or industrial appliance that uses electromagnetic waves in the microwave band to heat objects, mainly polar molecules, such as water. A microwave oven consists of a power supply, a magnetron, a control circuit, and a cooking chamber. Near the entrance of the cooking chamber, there is a rotatable stirrer, because the stirrer is a fan-shaped metal, and when rotated, it has a reflection on the microwave socks in all directions, so it can evenly distribute the microwave energy in the cooking chamber to heat the food.
Its power range is generally auctioned from 500 to 1000 watts.
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Summary. If you heat ordinary vegetables, you don't need to add plastic wrap, because vegetables contain water, and if you heat leftovers, it is best to add a layer of plastic wrap, because this will not make the rice on the surface hard.
Do you need to use plastic wrap for hot dishes in the microwave?
If you heat ordinary vegetables, you don't need to add plastic wrap, because vegetables contain water, and if you heat leftovers, it is best to add a layer of plastic wrap, because this will not make the rice on the surface hard.
From the perspective of food safety, the heat resistance of the plastic wrap commonly used in general families is not strong, and the oil in the food is easy to dissolve harmful substances such as plasticizers in the plastic wrap.
If it is a hot Chinese medicine or decoction, do you need to use plastic wrap? Thank you.
Do not use microwave ovens for traditional Chinese medicine, it will cause reactions.
It is best not to use microwave oven heating in traditional Chinese medicine, because the volatilization temperature of each component in traditional Chinese medicine is different, and if it is heated by the heating temperature of the microwave oven, the pharmacological effect of some drugs will be changed, thus affecting the efficacy of the drug.
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Microwave oven hot dishes make the cover with plastic wrap depends on the situation, heating ordinary vegetables can not be used plastic wrap, because vegetables contain a certain amount of water. You can use plastic wrap to heat leftovers, which can prevent the outside meal from getting tough. It is best to cover the heated meat with a plastic lid to avoid the explosion of the grease after heating and causing debris everywhere.
For example, when using a microwave oven to heat ordinary vegetables, you don't need plastic wrap because vegetables contain a certain amount of moisture.
If you use a microwave oven to heat leftovers, it is recommended to cover the outside of the leftovers with a layer of plastic wrap to prevent the surface of the rice from becoming hard and at the same time to allow the leftovers to be fully heated.
When microwaving meat food, it is recommended to cover the meat container with a plastic lid to prevent the grease from exploding during the heating process, and the microwave oven will be full of debris.
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