Plastic bags or plastic bags, glossy bags are the items we use every day.But many people do not know that there are many types of plastic bags used to store different objects.Like when we go to the market, we often do not pay attention to the type of plastic bags that stores use to store our food.If using inappropriate plastic bags can cause food to be "poisoned", poisoning our health.

Here are 3 habits of using plastic bags immediately because of silently bringing "poison" into the body by Prof. Dr. Kalayanee Sisingha, Lecturer of Department of Polymer Science and Technology, Chemistry, Department of Science, Mahidol University (Thailand) shared.

1. For hot food, just cooked in plastic bags

The first behavior we can see is to add newly fried, cooked foods, and still smoke and smoke in the plastic bags.This is something not to do.

Because the food is new to the food, especially the fried fried food, the oil is very hot, sometimes the temperature of up to 200 degrees Celsius can cause the plastic bag to be damaged or we can notice that hot oil can be doneMelting a hole in a plastic bag.

Therefore, what we should do is after frying to cook food, we should put it to one side for a moment for the temperature to decrease slightly, then put in plastic bags.

For plastic bags, we use food containers with two main types: hot bags] hot and cold [storage] bags.In particular, hot bags have 2 common types:

- Bags made from polyethylene plastic - Some people are called high -level polyethylene.On the label, pay attention to the recycling symbol, then the number 2, proves that this is a high -density bag, it has a opaque white color, has good durability and can withstand temperatures up to 100 degrees C.So, we can use it for hot foods such as soups, porridge, soy milk ...

- The other type is made of polypropylene or PP plastic, it also has a recycling icon but the number of the next number is number 5. This type of bag has a transparent and shiny surface, higher heat resistance is better than 100 degrees C.There, we can hold hot things like curry.

Cold bags made from polyethylene plastic but with low density (Low-density polyethylene).It has number 4, has a transparent surface, high flexibility but only withstand low temperatures.Therefore, you should be careful when using cold bags, do not put hot food in it to hold.

In general, basically, both hot bags and cold bags are produced to use once.Therefore, we should not use it to warm up food or place in the microwave, especially bags that contain foods high in fat or even sweets.When doing so, very high temperatures can melt the plastic.

2. Take a plastic bag to store food in the refrigerator

Perhaps many families do the same.We often buy food storage and then put them in the refrigerator with a plastic bag wrapped outside.Both hot bags and cold bags can be used in the refrigerator, no problem but we want to put it in the freezer, what Prof. Dr. Kalayanee Sisingha wants to emphasize that the hot bag is not suitable to preserve food in the food infridge.

This is because the very cold temperature in the closet makes the bag crispy and easily broken, the risk of food pollution is very high.

For example, when we go to the market to buy meat, the seller will pocket us and we just need to pocket meat in the refrigerator.In most cases, the type of bag used is not a plastic bag at the level used for food - cannot be exposed to food, because during the production process, some additives can beAdd or use paint/color containing heavy metals, such as lead, cadmium ...

Therefore, you should not use plastic bags when buying goods to store food in the refrigerator because it can be contaminated with pollutants from the production process.

3. Use a pen to write on plastic bags

Some people will write words on food plastic bags to know what to buy food or simply to know what the plastic bag is containing.

In the case of not hot or dry food, you can use the food pen or pen label with the word xylene free (no xylene) to write on plastic bags.

But if the food is hot and you use a pen that does not have to supply food, it is likely that xylene - a chemical used in industry that can cause poisoning, will absorb into food.

Therefore, make sure both of the above conditions if you want to use a pen on plastic bags!

Source and photo: Mahidol Channel