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How to open the jam jar?
The reason why the sealed jar can't be opened is that the air pressure outside the jar is higher than inside. If you want to open the lid, you must keep the air pressure inside and outside the storage tank balanced.

Six ways to open sealed cans:

1, you just need to find a bowl, and then pour some hot water into it, the hotter the better, preferably boiled water. It's enough to feel that you can't get through the bottle cap, and then put the bottle cap down into the water. The water in the basin just doesn't pass the lid, and the lid can be opened in about half a minute.

2. Cover the can cover with a wet cloth and twist the can cover hard to increase the friction, so that it can be easily opened.

3, knives, scissors, etc. , pry open along the tinplate edge of the bottle cap to keep the air pressure balance inside and outside the tank;

Some large crucibles are not easy to open even with a bottle opener, which requires a little external force.

Gently pry open the edge of the bottle cap with a stainless steel spoon. When you pry it open a little, the gas will enter and the bottle will be easily opened.

4. Use stainless steel and brass spoons and keys, wrap paper towels to increase the friction coefficient, pry open the bottle cap along the glass edge of the bottle mouth, air can enter the can to open it, and then dig the contents with a spoon to eat.

5. With the soft plastic internal tooth can opener, the internal friction coefficient on the side of the bottle cap is increased, the contact area between fingers and palms is increased, the pain of oppression is alleviated, and bottle caps such as wine bottles and jam can be easily unscrewed.

6. Put the jar in a pot, heat it with water at 80 degrees Celsius for half a minute, or heat it in an oven at 90 degrees Celsius for 2 minutes (radiant heating by heating pipes, never electromagnetic heating), so that the liquid and gas in the jar can expand and approach the indoor air pressure. Can be opened. If you like to eat cooked canned food, remember to loosen the bottle cap first, otherwise the bottle cap will swell out, not only hot, but also unable to open it.