First, you have to prepare the canned food within the shelf life. For example, mainland products need to meet the packaging standards of QB/T3563- 1999 cans (this is not nonsense. If a Daniel finds a three-person proton hot pot, it is estimated that scientists all over the world will study it for decades. )

The second measure: break the palm.

You can open a can with your palm. For example, "Diamond Finger" and "Eagle Claw Skill", it is said that "Tathagata Palm", "Fire Cloud Palm" and "Fierce Yang Palm" will also have miraculous effects. However, there is no such exercise in the gym. I believe that some friends have also seen the "iron sand palm" type of cross-cutting canned fruit performed by folk martial artists and Niutu Village. In short, if the grip strength of one hand exceeds 60 kg, you can easily handle more than 90% of cans on the market.

The third measure: broken knife type

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

The fourth measure: broken spoon type

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, and air can enter the can to open it.

The fifth measure: unique weapon style

Soft plastic internal teeth can opener is adopted, which increases the internal friction coefficient of the side of the bottle cap, increases the contact area between fingers and palms, reduces the pain of oppression, and can easily unscrew bottle caps such as wine bottles and jam.

The sixth measure: screwdriver type

Find a sharp screwdriver or knife and make a hole in the lid. Once the air is deflated, the air pressure inside and outside the bottle will be balanced and it will be easy to open.

The seventh measure: turning the river into the sea.

Turn the bottle mouth upside down, pat the bottom of the can a few times, then straighten it, put on a rag or gloves, and unscrew the lid forcibly. It uses the principle that after the air at the top of the tank is inverted and vibrated by the liquid in the tank, the small bubbles near the sealant skin burst, resulting in the local density increase in a short time.

The eighth trick: "hot break"

Put the cans in a pot or an oven and heat them with water at 80 degrees Celsius for half a minute, or put them in an oven and heat them with water at 90 degrees Celsius for 2 minutes (radiant heating with a heating pipe, never electromagnetic heating), so that the liquid and gas in the cans can expand and close to the indoor air pressure. 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. An oven pie, passing by sadly, is in danger of being possessed during practice ...

The ninth measure: crushing

Johnson, come out and zoom in. As we all know, cans "suck" very hard, and the biggest force is the difference between atmospheric pressure and the internal pressure of cans. It is easy to fly with your left foot stepping on your right foot, such as opening a can at the height of Mount Everest, taking a balloon to the stratosphere (excluding the internal pressure of a passenger plane), or using a manipulator to help in a vacuum laboratory.

Fresh-keeping articles after opening the lid

Scheme No.1

Solution of "opening and closing and maintaining vacuum"

How to restore the vacuum state of the jar after it is broken? Especially when there is less food, the volume of liquid in the bottle will decrease. Perhaps, it can be solved by the self-heating device on the bottle body and the design of adding a one-way valve on the bottle cap. Anyway, the laboratory doesn't need a vacuum in the tank. After closing the bottle cap for the second time, as long as a large part of the air in the bottle is heated and cooled to room temperature, it is in a quasi-vacuum state, which can play a role in keeping fresh.

Option 2

Make a fuss about the jar physically

Everyone is almost tired of tin cans, glass cans, aluminum alloys and other cans. Some people may be scratched by sharp metal edges. So, let's change the shape of the can. Small packaged food, hard plastic or corn film casing, soft jelly shell, lotus root or bullet chain, and a few knots when you want to eat.

Option 3

Utilize existing products

For example, the canned food is still in the original packaging, and a food vacuum box/vacuum can/deoxygenating box is provided for the canned food, and the inedible canned food is put in the box or can.

Seek the adoption of replication