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A portable refrigerator is a very necessary and convenient thing, which can help out on a long trip, on the beach, or on a hike. More than once we had to regret his absence, but somehow we managed to buy everything - there were always more important expenses.

And it’s good that you didn’t buy it, because you can make a cooler bag with your own hands, spending very little time on it. At the same time, the costs will be several times lower, and there will be more ease of use. Because both the shape and size can be made “to suit you”.

How to make a thermal bag and car refrigerator

One mini-fridge is not enough for our family. You need at least two. One in the form of a small bag - for hiking and cycling trips into nature. And the second in the form of a convenient and sufficient spacious drawer- for long car trips.

It’s necessary, so we’ll do it.

Option 1. Cooler bag for carrying by hand

For those who know how to hold a needle in their hands or are intimately familiar with sewing machine, sewing a cooler bag with your own hands will not be difficult. I don't have such talents. The most she can do is sew on a button. Therefore, I was looking for a master class where this skill, if required, was purely symbolic.

And I found it. True, to make a thermal bag, you first need to find a ready-made bag of the right size, but there will be no problems with this.

Besides this, you only need foil insulation and tape. And more advanced craftswomen can still arm themselves with sewing accessories and provide the product with additional fasteners - Velcro or a zipper.

• Folgoizolon- this is insulation, foamed polyethylene, covered on one or both sides thin layer metallized foil. Double-sided holds the temperature better, but single-sided will do. You can buy it at any hardware store, the price depends on the thickness and is 50-100 rubles per square meter.

• Scotch you can take any - regular, foil or double-sided. When you read the description, decide for yourself which one will be more convenient for you to work with. But foil is still better - it reflects heat.

• Bag. You need to select it before you go to buy insulation in order to determine its quantity. You can take any bag depending on your needs - beach, shopping or sports. Preferably with a lock. Remove the pattern from it and calculate how much foil isolon you will need. For example:

Now see how to make a cooler bag with your own hands:

Image	Description
	Step 1 We buy required quantity insulation. The thicker it is, the better our refrigerator will “work”.
	Step 2 We transfer the pattern to foil insulation, reducing it on all sides by a couple of centimeters. This is necessary so that the foil bag turns out to be slightly smaller than the main one and is easily inserted into it.
	Step 3 We cut out the parts and fasten them together with tape. We make sure that they fit tightly and without gaps to each other. Don't forget that the foil layer should face inward.
	Step 4 You can first “make” the joints with a stapler, pins, threads - whatever is more convenient for you. To make them airtight, we cut out strips from the remaining insulation and glue the joints on the outside again.
	Step 5 The lid can be made a little larger than necessary so that when closing the refrigerator, the allowances can be tucked inside. But it is better to sew on a zipper or Velcro.
	Step 6 The DIY thermal bag is almost ready. All that remains is to insert the resulting “fur coat” inside the bag-cover, and fill the space between the walls with any warm material- padding polyester, batting, scraps of an old blanket, etc.

This is the easiest way. If you're not too lazy, you can fit it exactly inner part to the outside and glue or sew it inside. In this case, the lid of the bag must be equipped with a zipper, and a valve is sewn on top of it so as not to let the cold out through the lock.

This is how you can make a cooler bag in just half an hour. Moreover, any crooked person like me can cope with this matter.

Option 2. Car refrigerator

On long trips or during multi-day vacations as “savages,” keeping food chilled, much less fresh, is not so easy. For such cases, you can make a refrigerator box from polystyrene foam with your own hands.

The most important thing is that you can choose the size yourself. If you want, make it small, just for storing water or beer. If you want, for the entire trunk, and then you can take with you a large supply of food, and even raw meat for barbecue.

And it will still cost mere pennies, because you need very little for a cooler bag:

• The basis. It could be a plywood box, cardboard box or Plastic container with smooth walls.
• Foam plastic or penoplex. The first one is cheaper, but crumbles when cut. The second one is more expensive, but denser, and it is easier to cut blanks from it. And both are incredibly lightweight and have high thermal insulation properties.

• Folgoizolon. We are already familiar with this material.
• Scotch, preferably metallized.

Manufacturing instructions:

Image	Description
	Step 1 We select or knock together a box of the required size from plywood.
	Step 2 We cut out five parts from foam plastic for the bottom and walls so that they fit snugly against the walls of the box and fit well together. This will be easy to do - polystyrene foam can be cut perfectly with a regular knife. You can seal the joints with tape.
	Step 3 We line the inside of the box with foil insulation, securing it with double-sided tape or a furniture stapler.
	Step 4 We tape the joints and the upper perimeter of the thermal box with tape. If desired, it can be covered with isolon on the outside as well. In this case, the insulation must be placed with foil “outside”.
	Step 5 We insulate the lid in the same way. The size of the polystyrene foam rectangle should be smaller than its plywood part and fit tightly inside the box to make the thermal refrigerator as airtight as possible. The lid can be screwed to the box on hinges, but this is not necessary. It is enough to make a convenient handle for opening.
	You can make a thermal refrigerator with your own hands from an ordinary box. And even without a base - just made of foam. Just remember that to glue it Do not use glue that contains acetone.
	Step 6 Not required. But if this is not difficult for you, then sew a durable case with handles. Especially if the box is covered with foil insulation on the outside. This will protect the insulation from damage and increase the usability of the refrigerator.

Such a thermal box by itself, of course, will not cool food and drinks. But it will be able to keep them fresh and cold for a long time. Which one depends on the thickness of the insulation, the quality of the “assembly”, the amount of contents, the temperature outside and other factors. But 12 hours is the minimum.

Cold accumulators

The cold will stay in the device you made much longer if you put something well frozen in it along with the food. And it is advisable to always have this something at the ready. After all, you won’t be carrying around a piece of frozen meat to cool your beer.

Therefore, at the same time as the thermobox, you need to make cold accumulators for the refrigerator bag with your own hands. You can also buy them. And in some household refrigerators they are available in the form of flat plastic flasks with a narrow neck and lid.

But making them is not a problem, so choose which method suits you best.

Liquid batteries.

These are bottles, rubber heating pads or plastic bags with a sealed Zip Lock fastener, filled with ice. Bags are more convenient, they take up less space and they can be filled with pre-frozen ice cubes.

Due to their shape, plastic bottles are not so convenient and practical; water must be frozen directly in them.

By the way, if you dissolve salt in water before freezing, such ice will melt much longer. The proportions are any, usually salt is poured until it stops dissolving.

Gel batteries.

They are more convenient (less risk of leakage) and hold the temperature longer than water ones. You can make them in two ways:

• From baby diapers. It’s very simple: pour water into the diaper until it stops being absorbed. If desired, it can be tinted with watercolors. We don't wait long and cut the diaper with scissors. We take out the swollen gel contents, put them in a tightly closed bag and freeze them.

• From gelatin or wallpaper glue . Dissolve as much salt in a liter of water as will dissolve, and then add another 3 liters of water. Pour gelatin or wallpaper glue into the resulting solution. Take the proportions indicated on the package. Dye - optional. All that remains is to pour the liquid into bags or bottles and freeze.

After each use, refrigerants must be placed in freezer and keep it there until the next time.

How to Make Your Homemade Cooler Bag More Efficient

Now you know how to make a thermal bag with your own hands and save a lot of money. Information on its effective use will also be helpful.

• Traveling by car, wrap the bag additionally in a piece of foil or just in a blanket.
• Try to hold it in a place where there is no direct sunlight.
• Cold accumulators It is best to place it on the bottom. And if there is space, you can use them to transfer food.
• It is advisable to fold the products themselves cooled into a thermal bag.
• The more tightly they are packed, the slower the refrigerator will heat up inside. Therefore, the remaining space needs to be filled either with ice packs, or with a rolled-up blanket, blanket, or just empty bottles.

• Try to open the bag as little as possible.

These simple steps help to significantly slow down the process of thawing and heating food. Sometimes they remain cold for two or more days.

Conclusion

You have already decided what you need more - portable bag or a large thermal box for travel? Or maybe both? In any case, now you don’t have to run around the shops looking for the right thing, but make it yourself in a couple of hours.

If anything is unclear in this description, watch the video in this article. But it’s unlikely that making a cooler bag seemed to anyone challenging task. And surely among the readers there will be those who have already solved it a long time ago.

If so, please show your creations in the comments with a description of the “production process”.

Cooler bag- it is also called a thermal bag, a thermal container. The principle of operation of such a bag is that it is made in the form of a thermos and prevents heat from getting inside.

There are now many offers on the Internet for the sale of such refrigerator bags, but the prices for them are not always affordable.

First you need to decide on the size of the future thermal bag, or rather, you need to choose a regular shopping bag required sizes or use a regular sports bag.

To make a cooler bag, we will need:
- bag
- foil polyethylene foam (it is also called isolon, teploizol, polyizol)
- Double-sided tape
- regular wide tape
- scissors

Foil polyethylene foam, you can easily purchase at construction market. This material is not expensive, and we will not need much at all (one meter will be enough). It is advisable to purchase one with double-sided foil (so that not only the cold does not escape, but also the heat does not enter) and a thickness of at least 5 mm. (the thicker, the longer the cold will remain)

Now we begin to cut out the polyethylene foam to fit the size of the bag. The cutting process is quite simple, it’s like gluing an ordinary box. Just do it in such a way that this box can easily fit into your bag. And when designing, don't forget about the lid.

Izolon is thick and constantly tries to straighten out, so a good help in making a thermal bag would be double-sided tape, which we glue around the perimeter.

Glue it side walls.

The thermal container is ready, now all that remains is to additionally cover all the seams with wide tape. The best option if you use aluminum tape to cover the seams (can be found on the building materials market, used for insulation), which will additionally provide thermal insulation of the seams, but this is an additional cost.

We insert the thermal container into the shopping bag and get a refrigerator that will not be inferior in quality to purchased ones.

Now you know too how to make a bag - a refrigerator with your own hands, so go for it.

The process of making the refrigerator bag itself took 30 minutes. And about $5 was spent.

But let's not forget that this bag itself will not produce cold. To create cold, you need to place cold accumulators in your bag. Ice that was frozen in the freezer the day before is used as cold accumulators.

You can use plastic bottles for freezing, but they are not very practical because they take up a lot of space and have a small area. For this reason, I recommend using plastic bags with a Zip Lock, they are more compact and efficient.

For this bag, I needed six Zip Lock bags, which I distributed evenly among the products.

Tests in field conditions showed that the ice in the bags just began to thaw after 12 hours in the heat. At the same time, drinks and food were chilled. But the main rule to keep the cold as long as possible is to look into your bag less often and close it tightly.

Each of us has heard the phrases “thermal bag”, “cooler bag”. But for many, such a device seems unnecessary, and some simply cannot afford it.

Should I buy or not?

At first we wanted to buy a refrigerator for the car, but then I changed my mind. There are many on the forums negative reviews I read the owners of such refrigerators - they are too bulky, they take up half the interior of the car, but inside, on the contrary, they are small and nothing fits. In general, I abandoned this idea.

I started choosing a thermal bag in online stores. This pleasure is also not cheap, and for a bag of the size we needed we would have to pay 500 hryvnia (1000-1500 rubles), plus cold batteries. But, in fact, a thermal bag is an ordinary bag with insulation sewn inside, which does not let out the cold and does not let the heat in from the outside. My husband is an engineer by training and explained to me the essence of the idea. And we started experimenting - making a cooler bag from improvised materials, and then testing it out during weekend outings.

First, we went to the market and purchased insulation. The choice was made on foamed polyethylene covered with foil. It looks like this:

Sold in all construction stores. Usually they glue it under the battery, with foil inside the room. And in heating season This simple device saves 30% of the heat that usually goes into environment. Costs linear meter This material costs from 8 to 15 hryvnia (the price depends on the thickness of the polyethylene itself, we bought the thickest - 10 mm). Its width is 1.5 meters. Enough, as they say, with the head.

We also needed some tape (the wider the better). Well, and, in fact, the bag that we planned to turn into a refrigerator. In principle, you can take a bag of any size - based on your needs.

The “transformation” process itself took about 20 minutes. First, we cut out such a “cross” from the insulation.

If you glued boxes together as a child, I think you guessed what was what. The central square is the bottom of the bag, the sides are the walls, and the remaining part will be the lid. The foil should be inside the bag.

When you cut, keep in mind that after gluing the box will need to be inserted into the bag, so make patterns 5-7 centimeters smaller than the actual size of the bag. We initially chose a blue bag with a width of 70 cm, but, looking ahead, I will say that the cut “fridge” did not fit into it, but it fit perfectly with my husband’s black one-meter sports bag.

Now use tape to connect the sides, gluing both the outside and the inside. Glue it well, don’t skimp on tape. The walls must fit tightly against each other, otherwise you will not achieve a thermal effect.

Initially, we cut the lid of the bag in one piece, but the insulation does not bend well, so we had to cut it off and glue it with tape. This made her more comfortable.

Now let’s talk about where the insulation waste actually went. We decided to glue the remaining four pieces at the joints of the sidewalls: we bent each square in half at 90 degrees and secured it with tape (with foil on the inside!). After this, the bag turned out to be double, which means the thermal insulation improved.

We place the resulting structure in a bag.

Our insulation box fit snugly. If there is any space left, I recommend that MirSovetov readers fill it with foam rubber or scraps of an old cotton blanket. So the insulation itself will not tear, and will not the right warmth it won't fit from outside. In general, insulate, don’t be shy.

That's all, the cooler bag is ready.

All that remains is to make cold accumulators. Plastic bottles acted as batteries. If the bag is small, take half-liter ones, if larger, then take liter ones. Now fill the bottles with a strong solution of table salt (6 tablespoons of salt per liter of water) and freeze. Can be filled saline solution old heating pads and freeze them too.

Nuances of use

From personal experience I will say that:

Cold accumulators should be located every 10-15 cm, this is the only way the food does not heat up for a long time. And if you wrap frozen foods or drinks in heating pads, they will begin to thaw no earlier than after 12 hours;
Wrap each product that you put in your bag in paper or newspaper - paper will add a thermal insulation effect;
fold all products tightly, try not to have any free space;
Before closing the bag with a thermal lid, cover the food with paper and then several towels. After this, tightly close the insulation lid, and then the lid of the bag itself;
try not to open the bag unnecessarily, do not let out the cold.

This bag keeps the cold for up to 24 hours. The first time we carried some food and cold drinks in it. After 12 hours the drinks were still cool, and after another 8 they began to warm up. Moreover, even perishable foods (eggs, cheese, ham) did not spoil after 20 hours.
But the best way We discovered the downloads on the second trip. We traveled for two days, the air temperature was about 40 degrees plus. The food (heavily chilled) was transferred with the same highly chilled drinks and frozen batteries. The heating pads were laid out on top, under the lid. The bag was in the car (I also wrapped it in a blanket) and the food was cool for more than 30 hours!
In general, we are very pleased with the result. I don’t know how many hours the branded cooler bag lasts, but our “homemade” product exceeded all expectations.

And recently they made a thermal package. We bent a rectangle of insulation and glued it with tape on the sides. We carry frozen fruits from the dacha home in it (a heating pad serves as a cold accumulator). Four hours of travel in the heat, and the fruit doesn’t even thaw.

Maybe the idea of ​​such a necessary invention will be useful to you. Enjoy it for your health! And if you figure out how to enhance thermal insulation and prolong the effect of the bag, write in the reviews.

A cooler bag will help keep food fresh during long trips. It is designed like a thermos, holding heat or cold inside. IN summer time this allows you to transport perishable products, such as meat or dairy, over long distances, or enjoy the refreshing coolness of drinks. In winter, such a bag is indispensable if you need to keep cooked food warm.

A quality cooler bag is not cheap. Available for sale various models, they can be conditionally divided into three large groups:

• shopping bags;
• mobile bags for transporting products;
• bags for car trunk.

These varieties differ from each other only in shape (the size of the base bag and the materials from which it is made), and the principle of preserving cold or heat is the same. Today we will present to your attention a master class on making a cooler bag with your own hands.

Instructions for making a cooler bag

Preparatory stage

To make a portable refrigerator we will need:

• bag;
• foamed foil polyethylene;
• scotch;
• zipper;
• scissors;
• needle and thread;
• pencil.

The base bag, which will then turn into a refrigerator, should be chosen depending on your needs: it can be large or medium in size, have a shoulder strap or regular handles. It is advisable that the selected model closes with a zipper and has a stable base. You can sew the base for the future refrigerator yourself.

Foamed foil polyethylene is a material characterized by lightness, strength and high thermal insulation qualities. It is sold in hardware stores in rolls 1.5 meters wide. To make a small cooler bag you will need no more than one meter of material. It is better to choose polyethylene, covered with foil on both sides and at least 0.5 cm thick. It costs a little more, but retains heat or cold better.

Foamed foil polyethylene – perfect material for making a cooler bag. It bends and cuts easily, is not afraid of moisture and weighs almost nothing

It is better to choose wide adhesive tape, and, if possible, metallized - it will create additional thermal insulation of the seams. Double-sided tape will not only connect the parts of the tab, but also secure it inside the container bag. The zipper can be replaced with Velcro.

So, all the elements of the future cooler bag are prepared, it’s time to start assembling.

Manufacturing

Making a cooler bag is not that difficult. You must first remove all pockets, partitions and other elements from the lining of the base bag. The manufacturing process of a portable refrigerator can be divided into several stages:

1. First of all, you need to make a pattern that completely repeats all sides of the bag, but about 0.5 cm smaller in size (the foil insert should fit inside the bag). It is imperative to provide a lid that will cover the structure from above. If the tab does not have a zipper, it is better to make the lid a little wider so that its end can be tucked inside. The pattern is easy to make if you alternately apply all sides of the bag to the paper.
2. Then, according to the pattern, a tab is cut out from thermal insulation material and glue it with tape to make something like a box with a lid. For convenience, the sides of the container can be pre-pinned together.
3. The resulting container is inserted into the base - the cooler bag is ready. For better thermal insulation, a zipper is sewn to the lid, and if there is space left between the walls of the base bag and the container, it is filled with foam rubber or cotton wool.

To make a cooler bag for shopping (thermal bag), you will need a more compact base bag and less material, but otherwise the manufacturing process will be the same. But to equip the trunk of a car with a spacious cooler bag, you will need Additional materials and a little more time.

The basis for a large cooler bag is most often a box made of plywood or cardboard. As a thermal insulation material, sheets of foam plastic are placed inside it, repeating the dimensions of the walls of the box and its bottom. The layer of polystyrene foam is followed by a layer of foamed foil polyethylene, which is secured with tape along the seams and along the upper perimeter of the box. The lid for the box is insulated in the same way. To make the bag easier to carry, you can sew a cover with handles for it.

So, making a cooler bag with your own hands is not at all difficult. However, such a bag itself does not produce cold; additional sources are needed for this. Cold accumulators can be bought in the store, or without extra costs make it yourself.

Cold accumulators

Cold accumulators can have a liquid or gel base.

To make a liquid-based battery, simply freeze water in an ice cube tray and place the pieces in a Zip-Lock bag. It is convenient to use such batteries: they do not take up much space and “adapt” to the shape of the products being transported. However, ice melts over time and bags are not always airtight, so food may become wet.

More reliable containers are ordinary plastic bottles in which water is directly frozen. The downside to this DIY battery is that they take up a lot of space.

In order for the water to melt more slowly, salt is added to it before freezing in a volume of at least 6 tbsp. l. for 1 liter of water.

Gel-based batteries are more practical: they do not leak and keep the cold even longer than salty water. You can make them in two ways:

• from diapers. Pour water into a new diaper, then remove the gel from it and place it in the freezer in a ziplock bag. Once the gel freezes, the battery is ready;
• from gelatin or wallpaper glue. Dissolve gelatin or wallpaper glue in salt water according to the instructions on the package. The resulting gel-like mass is placed in bags or bottles and frozen.

Rules for using a cooler bag

To keep your cooler bag cold or warm for as long as possible, you need to follow simple rules:

• It is better to put the food in the bag chilled; you can first wrap it in paper, since it retains the cold well;
• an additional layer of thermal insulation material or a blanket will help improve the quality of a portable refrigerator that is transported in the trunk of a car;
• cold accumulators should be placed on the bottom or between products;
• The cooler bag will retain its properties longer if you avoid exposure to direct sunlight and frequent opening;
• The food in the bag should be packed as tightly as possible; the gaps can be filled with towels or pieces of dense foam.

If you make a cooler bag with your own hands correctly and follow simple rules for using it, the food in it can stay fresh for up to three days.

Video on the topic of the article

You can learn more about how to make a cooler bag with your own hands from the video below.

Found a mistake? Select the text with the mouse and click:

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A thermal bag is an indispensable item at any time of the year. It will keep your food warm in winter and cold in summer. Today we will tell you how to make it yourself. In this article you will find everything necessary instructions, pattern and useful tips, which will help you create a budget analogue of this useful accessory at home.

The bag can be used as a kind of thermos to keep the dish warm for several hours (by the way, you can “raise” yeast dough in them). The thermal bag is also very convenient when traveling long distances. Homemade cooler bags help keep food fresh for a very long time (even on a stuffy train or in a car).

What do we need?

• base bag
• foil insulation (thickness not less than 0.5 cm)
• stapler

As a basis for a thermal bag, it is best to take a standard travel bag that you no longer need. Rectangular bags are especially convenient. However, if you don't have ready-made version, you can come up with an alternative.

What else can you take as a basis?

• Large plastic container with lid

Availability

Budgeting

– inconvenience of transportation

– not suitable for creating a thermos – it is only suitable for a cooler bag

• Homemade bag

If you don't have a ready-made base, sew it yourself! As a guide, you can take the pattern from the master class on sewing a carrying bag, replacing the mesh with fabric. Or the pattern below.

Ease of transportation

Reliability

Functionality

- additional time costs

• Wooden box

If you have plywood or wooden panels, put together a base box. As a guide, take the pattern presented in the previous paragraph.

Reliability

Durability

Excellent insulating properties

- inconvenience of transportation

We decided on the base for the thermal bag. Now you need to measure its parameters and write it down on paper. Let's say it turns out to be 25x40, height - 35. Do not add parameters to take into account the allowance. It is important that the foil insulation pad fits into the bag freely.

Create a pattern. You have already seen the option for a rectangular bag just above.

Cut out the foil base and fold the edges. In this case, the white part should remain on the outside, the shiny part on the inside. You need to fasten the edges together so that the foil is inside even at the seams.

There are several ways to join the edges. However, it is better not to use tape - it is unreliable. It is preferable to fasten the box with a stapler or simply sew the parts together. You will end up with a box with a loose lid. You can simply wrap it inside, but if you expect really decent performance from your thermal bag and plan to use it for more than one year, then sew in a zipper.

Now you just need to put the foil in the finished bag.

Our picnic accessory is already ready, all that remains is to “charge” it with heat or cold. You need to put the “batteries” inside, right next to the food. This way they will stay cold (or hot) much longer.

What “batteries” are suitable?

• Plastic bottles

If you are making a cooler bag, this option will be convenient. You need to prepare a strong one brine(per 1 liter of water 7-8 tablespoons of salt) and freeze it in plastic bottles. Now just put them on the bottom of the bag (you can also put them on the sides).

Salted ice melts slowly, which means your food will stay at the right temperature for quite a long time. However, there is an obvious disadvantage - bottles will add weight to your refrigerator.

• Zip locks

Prepare ice according to the recipe from the previous paragraph. Freeze in chunks and then fill into secure Ziploc bags. Just make sure first that they are not damaged (to be sure, check the integrity of the packages with water).

These zip locks can be used to line the inside of a bag on all sides, and several bags can also be placed between products. The effect is the same: the cold will remain for a long time.

• Diapers

Another way to keep the cold for a long time is to use diapers. Unfold the diaper and pour water into it until it is absorbed. When the diaper is filled to capacity, carefully transfer it to the freezer. After freezing, place the ice diaper in a tight bag and place it on the bottom, and place food on top. Or line the sides of the bag with diapers.

• Helium filler

This substance will melt even more slowly than the strongest brine solution. Prepare a strong saline solution and add another liter of water. Pour a bag of gelatin and 4-5 tablespoons of wallpaper glue into it (or pre-cook the paste). Freeze and place in ziplock bags. Place between foods.

Tip: To make your refrigerator even more enjoyable, you can add food coloring to the water before freezing. This way you will get a bright and beautiful “battery”.

• Warmer

The main advantage of a homemade thermal bag is that it turns out to be very budget-friendly. In addition, you can always change its “shell” and size. Another obvious advantage is ease of manufacture. Set the ice to freeze and start sealing the bag. You will be surprised, but your accessory will be ready faster than water turns to ice.

Take a homemade thermal bag on a trip or for a walk with your child, or take it with you on a picnic. You definitely won't be disappointed in it!

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