Century technical progress leaves its mark on society. More and more housewives are in search of optimized bypass items, be it multicookers, electric kettles or blenders. Products of this kind include screw caps that make life much easier. Of course, seaming machines are not a thing of the past; many people still use them to seal pickles. However, more modern housewives prefer not to bother. Let's consider important aspects in order.
How screw caps work
Today, screw caps are widely used in America and Europe. Products of this kind are called “Twist-Off”; their operating principle is quite transparent.
The inside of the lid has a slippery polymer coating that serves as a gasket. As a result of exposure to high temperatures, this element swells, significantly increasing in thickness. This move allows you to press the lid to the neck of the jar as tightly as possible, preventing air from entering and, as a result, spoilage of the final product.
Thanks to their powerful sealing, screw caps are suitable for preserving jams, pickles, canned goods, etc. When the temperature drops, the gasket shrinks, which is accompanied by a click. The lid sags deep into the jar, this move creates a vacuum effect. Before rolling up pickles using lids like these, they need to be well heated.
Technology for sealing jars with screw caps
Any housewife wants to get the correct answer to the question: “How to properly close jars with Twist-Off lids?” In this case, the process does not represent great difficulties. However, like any other business, it includes certain features that must be taken into account. Twisting will not take much time.
- First of all, inspect each cover for the presence, or rather the absence, of all kinds of defects. The surface of the cover should not have rust “bugs”, strong dents (if possible, exclude such specimens altogether), small and large scratches.
- After you have inspected the lids, they need to be sterilized. The procedure is carried out through thermal treatment. Pour in enamel pan Place running, or preferably filtered, water on the stove and bring to a boil. When the first bubbles appear, place the lids in the container, reduce the heat to medium, and cook household items for a quarter of an hour.
- After the specified period has passed, spread a cotton towel on a flat surface, remove the lids with kitchen tweezers, and leave until completely dry. Sterilization should be carried out immediately before preservation.
- After cleaning the lids, proceed to tighten them. Pour the desired contents into the jars, place the lid on top of the neck, and screw it on. To check the tightness of the rolled container, turn it over hot jar neck down, cover with a towel and leave until completely cool.
- If the rim does not become wet, it means the preservation was successful. In this case, the jars must be taken to a cellar or basement for long-term storage.
How to Store Screw-Lid Jars
- Jars sealed with screw caps should be stored in a room with optimal humidity(up to 40%) and stable temperature conditions. Ideal option A ventilated pantry, a dry basement or a glazed loggia will serve. Give preference to rooms or areas that are well ventilated. This move will prevent the formation of mold that appears due to condensation. Important! Do not store jars with screw caps in the cellar, as such a room is too high humidity. Also, you should not keep containers on open balcony, where the temperature regime often fluctuates.
- If jars of homemade twists are small (canned food, jam, etc.), store them on the bottom shelf of the refrigerator or in the cellar. This category refers to compounds prone to rapid fermentation, so the room should be cool.
- Don't rush to send jars of seaming to long-term storage immediately after preservation. First you need to place them with the neck down, wrap them in a warm cloth and cool to room temperature. After performing the leak test, check that the cap is not bulging. If everything is in order, the containers can be moved. Homemade pickles are stored in jars with such lids for six months or longer.
- The service life of screw caps is quite long provided all operating conditions are met. If you do not find rust, dents, or large scratches on the product, the lids are reusable. If you clean the varnish coating with a hard sponge, the product will quickly become unusable. As a rule, the duration of service varies from 3 to 5 years.
How to open a screw top jar
There are often cases when even the most experienced housewives complain that they cannot open a jar with a screw cap.
The difficulty lies in the impossibility of asking a representative of the strong half of humanity, who is not always nearby. At the same time, you also don’t want to spoil the product by making a hole in the surface with a knife to let out excess air.
To simplify the procedure, turn the container upside down and hit the bottom with your palm several times. After this, try unscrewing the cap and repeat the procedure if necessary.
It is not difficult to roll up jars with screw caps if you have sufficient knowledge regarding the available technology. First, sterilize the lids, pour the contents into containers, and immediately screw them on. Store in a temperature-stable room where humidity fluctuates within acceptable limits.
Video: choosing jars and lids to prevent food from exploding
Time is one of the fleeting resources that humanity has. Wearing a watch helps keep track of it. Do not forget about one of the disadvantages of the accessory - the presence of a battery, which can exhaust its limit at the most inopportune moment. Find out how to remove the batteries without damaging the device.
Is it possible to replace the watch battery yourself?
All people have used this at least once a simple device. A person values time and is afraid of being late for an important meeting, to the hospital, or on a date. Devices capable of counting help you control and set priorities correctly. There are situations when the phone or other equipment dies and a person is left with only wrist watches that help control time. They can stand up too. What to do in this case?
You can replace the power supply in two ways: yourself or go to a workshop where experienced specialists know how to change the battery in wristwatch. If repairs in such a place are impossible, then you will have to do it yourself. Replacing batteries requires care. One awkward movement can damage the accessory. Restoring Nick's Swiss or jewelry watches and memorabilia is especially expensive.
How to open a wristwatch
Owners of any walkers know that the baby charger is located on the back of the device. The cover is attached different ways: on bolts or by pressing. Given this fact, it needs to be removed in a certain way:
- In the first case, you have to take a screwdriver and disassemble it by unscrewing the fasteners. Do not forget to place the accessory on a flat surface and secure it to avoid falling.
- In the second case, you should be more careful. First, the device is secured, then you have to pick up the cover with tweezers and remove it.
When the cover is removed, all that remains is to figure out how to change the battery in your wristwatch. To do this, it is advisable to carefully look and disassemble the device layer by layer, be it a quartz or electronic version. Lay out the parts in order and separately - on a fabric surface or napkin. Previewing video materials that should contain instructions will help avoid damage that could ruin the operation of the product.
How to replace the battery in a wristwatch
If “time” has stopped, how to change the battery in a wristwatch is not an idle question. To avoid damaging the device, replace the power supply with care and compliance. step by step instructions:
- Remove the accessory from your hand.
- Place on a flat surface and secure.
- Open the lid. Unscrew the bolts if present.
- Extract old block feeding with tweezers. Remember or write down its position.
- Buy new element nutrition. Buy the appropriate type of battery.
- Insert the new battery into the recess.
- Close the lid. If there are bolts, they must be tightened.
- Start the device.
How to close the cover of a wristwatch
The problem of how to change the battery in a watch has been solved. The old battery is removed and a new one is installed in its place. All that remains is to figure out how to close the watch cover. It won't be too difficult to do this. The main thing is to remember the opening system of the structure. If bolts were used for this, then you need to insert them into place and tighten them. If there was a pressed-in lid, then it must be pressed down tightly. You can use a board, because its wide surface evenly distributes the load. A click will indicate that the procedure was completed successfully.
Video: replacing batteries in a wristwatch
Many housewives know how to roll up jars. During the ripening season of vegetables and fruits, the production of pickles, jams, and various dishes begins, which are served iron lids. This increases the shelf life of products and allows you to eat delicious food from independently grown fruits. But not everyone knows how to close jars correctly.
How to roll up jars correctly: basic methods
In seaming they are used metal lids, which are tightly screwed to the can. There are 3 options for closing with different devices.
Manual mechanism
The manual seaming machine was one of the first to appear. It is found in most homes, where it has often been stored and used since Soviet times. When using a screw device, the process is completely controlled by a person, but requires force to be applied to the lid. This option is one of the most difficult, since practical knowledge is required.
How to properly roll up a can using a manual machine:
- It is necessary to place the lid on the jar, press it with the device, and roll it up in a clockwise circular motion.
- Making several turns, the handle is rotated to reduce the diameter of the roller, then the process is repeated.
- Care must be taken not to damage the jar, but it must be screwed tightly to ensure a tight seal.
The main advantage is low cost and ease of use. The work requires a lot of effort. Among the disadvantages is the need to expend energy, since there are modern models that do not require this.
Snail key
It is an ordinary screw machine, but does not rotate along the central axis. Instead, a spiral is created on the plane of the device. The mechanism of operation is similar: the lid is pressed tightly with one hand, and rolled up with the other, guiding the device in a spiral. For a tighter twist, the handle is rotated clockwise, reducing the diameter along which the mechanism moves. When the probe moves the shortest distance to the center, the handle is unscrewed counterclockwise and the machine is removed.
The advantages are ease of use, but the main disadvantage is the time required to seal one can. Despite the ease of use, it is necessary to check the quality of the work performed to avoid loss of products.
Semi-automatic
It is a regular seaming machine with horizontal and vertical handles designed for holding and screwing the lids. The latch has a thread along which the mechanism rotates, pressing the metal against the glass. To tighten it, just install the device and turn it until it stops.
The advantage of semi-automatic machines is the speed of processing cans: less than one minute is enough for each one. Disadvantages - high cost, need for adjustment. Although the devices are sold adjusted, the balance is lost after 200–250 cans. Re-tuning takes a lot of time, but is not always successful, which makes it necessary to purchase a new machine.
Machine
A fully automatic machine is an easier-to-use version of a semi-automatic machine with a more complicated mechanism. Has two handles used for twisting. How to seam cans with a seamer:
- The device presses the lid tightly.
- The key is turned 7–9 times until a characteristic click is heard. There is no need to turn the screw during seaming.
- To remove the device, you must turn the key completely in the opposite direction.
The advantage of an automatic machine is its ease of use, long work without breakdowns. Disadvantages - high cost, the need to unwind the device for a long time in both directions.
Seaming Vacuum Pump
The vacuum pump allows you to roll up the lid without using a special machine. To use the device, you need special covers that are inserted from below. Then the mechanism is put on the jar so that the lid clearly coincides with the neck. To complete the process, just pull the piston: the lid will press tightly, pushing away the air.
The advantage of the pump is its quality and speed of work. Disadvantages include cost and the need for skill.
How to check for leaks
To ensure the quality of the seaming, you must perform the following steps:
- After rolling up the jar, turn it over and check if the lid is leaking.
- Take the jars to the room with room temperature, place it upside down on a blanket, towel or blanket.
- Leave the containers for two days. Check periodically for any wet marks on the fabric.
- After 48 hours, make sure that the lids are not swollen and that cracks or chips do not form on the jar.
If everything is in order, send the jars for storage.
How to Seam a Can without a Seamer
To roll up a can, you don't have to use a machine. First option: use the one described above to store food Vacuum pump, although it is more expensive than conventional devices.
The second option is the use of cans and screw caps. The sterilized container is filled with the necessary products, covered with a lid, which is tightly screwed until it stops. This option is not so reliable, but easy to implement. But is it possible to seal jars with screw caps? Technically, no, since special machines are used for seaming. Despite this, the result is almost the same.
How to properly seal jars with screw caps
To properly twist pickles or jam you need:
- Make sure the quality of the lids and jars, the absence of mechanical defects and other undesirable factors.
- After checking the parts, sterilize them to prevent uninvited guests in banks.
- While the lids and jars are sterilizing, prepare the dish you plan to store.
- Fill the containers with food, close the lids, screw tightly.
After checking the tightness, send the jars for storage.
How to seam cans with a seaming machine: video
IN next video The process of rolling a can with a classic machine is presented:
If you constantly buy mayonnaise, sauces and other products in supermarkets glass jars with screw-on lids, you don’t have to worry at all about containers for winter preparations. Forget about special seaming machines and additional costs for purchasing cans. Why? Everything is extremely simple, because when asked whether screw caps can be reused, experienced chefs answer in the affirmative.
Twist-offs and their advantages
Jars with threaded necks designed for screw caps are modern and very rational decision. Forget about unreliable seaming machines, which very often cannot press them tightly enough to the glass. The result is that homemade preparations spoil, and all the efforts that were expended on their preparation become in vain.
That is why most housewives have long begun to use twist-off lids, which will last for several seasons. Yes, they are reusable, it is only important to keep them clean and follow certain rules before screwing them onto the jar.
Since the products offered in glass containers with screw caps, have different weights and volumes, you can easily choose options for any type of workpiece.
Terms of use
How to use screw caps?
- The first thing to do is rinse thoroughly required amount. Check carefully to ensure there is no mold or rust on the inner surface.
- The next stage is heating, for this it is quite possible to use hot water, with which the products need to be poured for five to six minutes.
Why is this necessary? Inner surface– environmentally friendly polymers that soften in highly heated liquid and allow you to screw the lid on a glass container quite tightly. As the lid cools, it will gradually retract inward. This will be indicated by a characteristic click. Now a “vacuum effect” has been created inside the jar. Everything is very simple!
Advice. Do not screw the caps too tightly; you may simply damage the threads. Place them vertically before you start screwing. You should not overfill the jars with contents; be sure to leave about a centimeter of free space.
Storing blanks in such containers is possible in a fairly warm place; some types of canned food should be placed in a refrigerator or cellar at a fairly low temperature.
If you follow the rules for using screw caps, they will last for several years. After the contents of the jar are eaten, rinse and dry them very thoroughly. Try not to use aggressive detergents.
For any housewife with the onset warm season The hassle only increases. First, you need to plant something on the plot in time, and then still find the strength to harvest the crop. After which many are faced with the problem - how to preserve it so that in winter they can treat their household? The main way to preserve berries and vegetables is canning.
This method has undergone many changes over the years of its existence. Everyone remembers the old seaming machines. Many people still use them today. Disadvantage of this device is that it must be used with great caution. With a little more effort than required, you will end up with a jar with a damaged neck, which you will not be able to use in the future. But as a result of numerous tests, housewives today know how to properly roll up cans with a machine.
But everything is changing, and the old cans have been replaced by new ones, the lids of which are screwed on. That is why more and more housewives are asking this question: “How to roll up jars with screw-on lids?”
Operating principle
Screw caps are called twist-off and are already long time used for conservation in Western countries. The essence of their operating principle is as follows. On inside lids have a special polymer coating, which acts as a gasket. Under influence high temperature it expands and seals the jar tightly. As the temperature decreases and as it cools, the top of the lid pulls inward, which is accompanied by a slight click. As a result, a vacuum effect is created in the jar. Therefore, before rolling up jars with screw caps, it is necessary to heat the lids.
Terms of use
Most housewives, having looked at their neighbors or friends, decide to buy such lids for themselves, but do not know how to roll up jars with screw-on lids. There is nothing complicated here. First you need to sterilize the jars in the same way as regular ones. At the same time, this can be done with lids. The temperature for lids should not be more than 60 degrees. Otherwise, this will lead to destruction of the polymer coating.
The heated lid is placed on the jar ready for sealing. In this case, it is necessary to ensure that the grooves on the lid coincide exactly with the stripes on the jar. And it’s also important to inspect the jar, or rather the neck, before
Quality control
In order to check and save yourself from worries about the reliability of the conservation performed, set closed jars neck down. They must remain in this position for at least 2 days. If during this time no smudges have appeared and the lid has not swelled, then you can safely hide the jars in a cellar or basement.
How to open such a jar?
More than once you can hear from housewives that it is very difficult to open such banks. And if there are no problems with how to close jars with screw caps, then it may be impossible to open them. In order to do this, you need to know a little secret: just turn the jar over and hit the bottom with your palm. After this, screw on the lid.
Thus, from the above we can conclude that the use of new jars with screw-on lids has made the life of housewives much easier. This preservation method is suitable for those who don’t want to spend a lot of time in the kitchen or don’t know how to roll up jars with a machine.
