The easiest way to unscrew the lid of a can

Canned food must be a very common thing in our daily lives. In the supermarket, we can see all kinds of canned products, such as canned fruits, canned sardines, canned Lao Gan Ma and all kinds of canned sauces. Although these cans are delicious, sometimes it takes a lot of effort to open them, even if they are strong men.

At this time, we must learn to use this technique to open the can, and then I will introduce a few ways to open the cap of the large can.

Method 1: We first insert the tip of scissors or the tip of the knife into the edge of the cap, and then gently pry the cap, paying attention to controlling the strength of the cap, so as not to scratch the cap with the tip of the knife and fail to close it. This allows us to easily open the can as soon as the air enters the bottle.

Method 2: The hand first forms a roof shape, the fingers are together, and the finger joints are about 90 degrees. After that, aim at the bottom of the bottle and pat it vigorously upwards about ten times.

As the air on the top of the can vibrates when the liquid is turned upside down and the hand is beaten, the small bubbles close to the sealing rubber part will burst, causing the density inside the can to increase and it can be opened.

Method 3: First prepare a basin and add some hot water to the basin, the water temperature is as hot as possible, and the water capacity can feel that the water can not pass the canned bottle cap. After that we put the bottle cap down in the water.

After waiting for about a minute, we will find that the cap has been opened very easily.

It should be noted that it is dangerous to use the tip of the knife to open cans, and some glass cans are made of special materials, and may not be able to be soaked directly in boiling water, otherwise it is easy to cause bursting and injuring themselves, so when using the above methods, you must pay attention to safety.

There is a trick to opening the lid of the can, gently touch this small mechanism, and it will be unscrewed without effort, and it will be used for real purposes.

There are several ways to easily open the lid of a can:

1. Method 1:

Take out a can first, put the head of the can down, the tail up, and then pat the bottom of the can with your hands, you can pat it a few more times, so that it will have an effect. Then turn the head of the can over and unscrew the lid with a little force by hand, and it will be opened successfully.

2. Method 2:

First of all, tear off a layer of plastic wrap, fold the plastic wrap in half to be larger than the bottle cap, then put it on the bottle cap, and then use your hand to twist the plastic wrap to twist the bottle cap, which can increase the resistance between the hand and the bottle cap, after increasing the resistance, the strength used will play a role, as long as you twist it hard, you can unscrew the can cap.

3. Method 3:

You can prepare a plate with a wide mouth, put the can upside down on the plate, and pour in water at about 70 degrees. It should be noted that the amount of water must not pass the cap, so that it will have an effect, after pouring hot water, leave it to soak for 30 seconds, after 30 seconds, put the can right, and then twist it lightly with your hand, it is easy to twist open.

The principle that cans are difficult to open

The principle that cans are difficult to open is because the inside of the cans and bottles is vacuum, and the air pressure outside us is greater than the air pressure inside the bottle, so it is difficult to open, and when we pry the lid with a spoon, it is a lever force, so that the lid and the bottle can easily create a gap in front of the bottle, so that the air pressure inside and outside is equal, so the lid can be easily opened.

When using the principle of thermal expansion and cold contraction, the can cap can be easily unscrewed due to the expansion. However, it should be noted that do not put the canned food taken out of the refrigerator into hot water, too strong thermal expansion and contraction may cause danger to the glass**.

1. Use rubber bands.

Put the commonly used rubber band on the bottle cap, so that when opening the can, it will increase some friction, the hand is not easy to slip, and the force to keep the right eye is relatively large, and it is easier to open the can, and it will not be open because of slipping.

2. Heating method.

Soak a towel or rag soaked in hot water, put it on the lid for about 5 minutes, and use the principle of thermal expansion and cold contraction to open the cap.

3. Material beating method.

Place the can on a hard ground, preferably a slate floor, and touch the cap with a little force a few times to the ground, and then you can easily unscrew the lid by hand.

Hello dear and happy to answer for you. Found for you: How to easily open the lid of a can:

The first trick, let's knock the lid a few times, this trick is very simple, but particularly effective, at this time we only need to hold the bottom of the bottle with our hands, and then turn the bottle upside down, knock it out a few times on the table, and then twist it by hand, it is very easy to open the lid of the can, this method is that children can also open it, very easy, very simple. The second trick, we can use plastic wrap to open the cap, we put the prepared can on the table, and then take out the plastic wrap at home, wrap the lid completely with plastic wrap, and then twist it vigorously, so that the lid of the can is also clearly opened. How does this work?

Because the friction of plastic wrap is relatively large, we use the friction between plastic wrap and the bottle cap to make the bottle cap easy to open, in addition to the plastic wrap, we can also use rubber gloves, towels and other items, which can increase the friction. The third trick is to pat the bottom of the bottle. Let's turn the can upside down and hold it in our hands, and then pat the bottom of the bottle several times, this should be decided according to our actual situation, and we should also pay attention not to use too much force when shooting, so as not to hurt our hands, so that the air pressure inside the bottle will impact the bottle cap, so that the bottle cap becomes loose, so that it is easier to open, and after the shooting, we will use a little force, it will be easy to unscrew.

The fourth trick, the hot water method, let's prepare a small plate first, pour an appropriate amount of hot water into the plate, and then turn the can upside down and put it in to soak for half a minute, that is, put the position of the bottle cap into hot water and soak it. When the time is up, let's turn it over first, and then wipe the moisture on the surface, and then twist it with a little hard hand to open it very easily, this is because of the principle of thermal expansion and cold contraction, the expansion coefficient of the iron lid and the glass bottle is not the same, the iron lid will expand faster, so the lid will become loose, and it is very easy to open with a twist, and it does not need to use a lot of force. The fifth trick, the spoon method, let's take out the spoon at home, use the spoon to pry at the edge of the bottle cap, you will hear a poof, the sound of deflation, this is because the unopened bottle is vacuum, will firmly suck the cap, so it is difficult for us to open it, and when we deflate, the air pressure inside it is the same as the air pressure outside, so it is easy to unscrew the cap.

I hope mine can help you and have a great day

Summary. How to easily open the lid of the can: 1. Hot water method, take a plate and pour hot water, the amount of water can not pass the bottle cap, and then put the bottle upside down in the hot water, let it stand for about 30 seconds, and then screw the lid when the time comes, it will be easy to open, if you are too troublesome, you can also put it directly under the hot water faucet to rinse it.

This is based on the principle of thermal expansion and cold contraction, the iron lid and the glass bottle will expand more quickly, so the lid will become loose and open as soon as it is twisted.

How easy it is to open the lid of a can.

How to easily open the lid of the can: 1. Hot water method, take a plate and pour hot water, the amount of water can not pass the bottle cap, and then put the bottle upside down in the hot water, let it stand for about 30 seconds, and then screw the lid when the time comes, it will be easy to open, if you are too troublesome, you can also put it directly under the hot water faucet to rinse it. This is based on the principle of thermal expansion and cold contraction, the iron lid and the glass bottle will expand more quickly, so the lid will become loose and open as soon as it is twisted.

2. Pat the bottom method, this is simpler, I believe many friends will have this method, that is, the bottle of the can is upside down, and then pat the bottom of the glass bottle with the palm of your hand, this can be more vigorous, because the strength of everyone's hands is still limited, try to twist the cap a few times after a few beats, until the bottle cap can be unscrewed.

Opening the lid of the can can can can be easier with a special can opener, hot water soaking, rubber gloves and spoons, etc.

1. Use a can opener

A can opener is a unique tool that can help you open the lid of a can with ease. Simply clamp the opener between the can and the lid and move it outwards to open the lid easily.

2. Soak in hot water

When the cans are soaked in hot water for a period of time, and when they are heated, the lid of the iron can expands due to the temperature and becomes loose. However, it should be noted that the water temperature should not be too high to avoid burning your hands.

3. Use rubber gloves

This is a very simple way to put rubber gloves on your hands and then hold the can lid tightly with your hands, which increases the friction of your hands and makes it easy to unscrew the lid.

4. Use a spoon

Insert the tip of the spoon into the mouth of the can and gently move it, using force to separate the mouth from the lid so that the can can can can be easily opened.

Related principles

The above methods are all achieved by increasing friction or using the principle of separating the can mouth from the can lid. The second of these methods is achieved through temperature expansion, and after soaking in water for a period of time, the lid of the can is heated and expands, making it easy to open.

Cans that are easy to pull apart, such as beverage cans or cans with easy to open lids, do not need to pursue the above methods, and it is a relatively easier way to open them by lifting the pull ring.

Sealing is an important means of resealing canned food for long-term storage. The sealing of the can can block the circulation of air and water inside and outside the tank, prevent the microorganisms outside the tank from penetrating into the tank, and kill the spoilage bacteria in the original tank, so it can prevent the contents from deteriorating and deteriorating and resisting long-term storage.

If the sealing is not complete, all conditioning, sterilization, packaging and other operations become meaningless. Therefore, sealing is one of the most important basic operations in the manufacturing process of canned food, and modern metal can sealing relies on double sealing to complete.