How do I preserve an old book? Vacuum with the method of canning? Or a sealed plastic bag? Or a wood

The first thing is to check in detail for insects, and wrap it in polyethylene plastic and place it in a ventilated environment with suitable temperature and humidity to ensure that the book is fine. It will be moved once every one or two years, and it will not be a problem to save it for a hundred years. In a hundred years, there will be great changes in society, environment, science and technology, and humanities, and it will be time for other collectors to find a way.

It is sealed in a plastic bag, then put into a vacuumed can, and then put it in a wooden box for preservation.

I have watched programs such as the Forbidden City Archives, and the preservation of ancient books requires a lot of attention to such as proper temperature, dryness and humidity, insect and rodent prevention, and avoiding direct light.

The storage of calligraphy and painting should pay attention to the appropriate temperature and relative humidity, and in the humid areas of the south, the calligraphy and painting can be placed in a well-sealed cabinet and bag, and an appropriate amount of mildew and insect repellent can be placed. In summer and winter, try not to use ancient paintings and calligraphy. It is best to wear clean muslin gloves and fold gently and gently.

When viewing paintings and calligraphy, do not let daylight shine on the screen for a long time.

For private collections of ancient paintings and calligraphy, first of all, it is necessary to record in detail the information related to the physical objects of ancient paintings and calligraphy. Secondly, it is necessary to prepare appropriate storage equipment, such as boxes and cabinets, etc., and to have anti-mildew and anti-insect measures. In addition, the storage location must have safety protection measures, anti-theft, fireproof, waterproof, and anti-rat.

It is necessary to regularly inspect the state of preservation, ventilate when the climate is suitable, and avoid direct sunlight. The most important thing is to listen to the scientific advice of the conservation professionals, ask them to carry out a comprehensive inspection of the state of preservation of the ancient paintings and calligraphy, and if necessary, ask the experts to reframe them. If you do not have the appropriate storage conditions, you can contact museums, archives and other professional institutions and entrust them to keep them on your behalf - there are now many public museums and archives that are willing to manage the collection of cultural relics for citizens.

Traditionally, collectors have to take out the paintings and calligraphy in the crisp autumn season, either hanging or exhibiting, the main purpose of which is to remove the moisture accumulated from long-term storage. When framing calligraphy and paintings, a large amount of water is used to clean the picture, remove the old mounting, and paste the new mounting.

Due to the characteristics of the materials and materials of Chinese paintings, they are not water-phobic and water-afraid. Of course, if the calligraphy and painting are left in a place with high humidity for a long time, it is likely to become moldy or attract silverfish, which will cause fatal damage to the calligraphy and painting.

Homemade canned sealing method:

1. When buying a glass bottle, there must be a lid.

2. After filling, put it in the steamer and steam for 5 minutes.

3. Under the action of pressure, the cap will shrink inward, and the can will be sealed.

Note: Canned fruit has a high content of water and sugar, and after opening the lid, it is easy to cause a large number of microorganisms, causing rancidity of the product and losing its edible value. It is recommended to open the lid and try to consume it all at once.

How can an open can be sealed tightly? In doing so, it is immediately sealed and airtight.

with rubber rings.

Make the temperature inside the bottle higher than the outside temperature before screwing, and seal under pressure.

If you don't have insurance, add wax.

Bring hot water to a boil and seal the wax on the mouth of the bottle after cooling.

Put the lid on the bottle and put it in the pot and steam for about 10 minutes.

Canned food generally has preservative additives, and the oil-soaked food itself is not easy to spoil, put it in a fresh-keeping bag and put it in the refrigerator for ten days and half a month. If you don't have a refrigerator, just keep it in a cool place with closed light and avoid moisture. Of course, from hygiene and nutrition.

It is better to consume it as soon as possible.

Be sure to keep it in the refrigerator! Unless you're in the snow! Or maybe it's around zero or below, otherwise it's going to be rancid in a day!

Of course, it's in the refrigerator. But now that it's cold, you can leave it out if you eat it tomorrow.

Just put it in the refrigerator at the top level, no need to seal it. Remove and defrost and heat before serving.

Seal in a plastic bag and place in the refrigerator.

Safety film, refrigerate and consume as soon as possible.

In our daily lives, we often see canned fruits.

They are often stored for a long time, which can ensure that they will not deteriorate for a long time, so in the process of making canned fruit, will they add some items that are harmful to the body in order to ensure its storage time? Is canned fruit harmful to the human body? When it comes to whether canned fruit is harmful to human health, then we have to talk about the production of canned fruit, canned fruit, mainly fruits, including yellow peaches, apples, hawthorns, lychees, and strawberries, which are also the most common on the market.

Speaking of the production of canned food, originated in 1809, when the world was developed, in order to help those who worked at sea, because they could not eat fresh vegetables and fruits and get sick, and some could even be life-threatening, French Napoleon ** used a huge prize of 12,000 francs to solicit a way to store food, and many people invested in research in order to win the award. Among them was Appel, a Frenchman who worked in candied food and worked in sauerkraut factories, wineries, confectionery shops and restaurants. When he sold fruit pulp, wine and other foods, he found that some of them tend to spoil, while others do not deteriorate easily.

After continuous research and practice, he finally found a good way: put the food into a wide-mouth glass bottle, plug the mouth of the bottle with a wooden stopper, put it in a steamer to heat, and then plug the wooden cork tightly and seal it with wax.

If you want to know how the canned food is guaranteed not to go bad, you must first understand why it is spoiled, the food is rotten and spoiled, because of the growth and decomposition of microorganisms, they constantly decompose the essence of the food, and the food spoils as a result. Then we need to solve the problem of microorganisms and bacteria first, whether it is food or canned food, it needs to be sterilized, and after the bacteria and bacterial spores are eliminated, there will be no bacteria to multiply. However, it is unlikely that all of them will be eliminated, and what can be achieved is basic sterilization, so that the food can be stored for as long as possible.

There are also a large number of bacteria and bacterial spores in the dust and so on in the air, and the spores of bacteria are like the seeds of a tree, which are very durable and can be carried by the wind. So the cans are all vacuum-sealed.

Finally, it is also a part of whether it is harmful to our body, that is, to add preservatives, all canned food will be added preservatives, preservatives can play a role in making food not deteriorate, but at the same time, it will also have some impact on the human body, so far, China has only approved 32 kinds of food preservatives that are allowed to be used, and they are all low-toxicity and high-safety varieties. They have undergone a large number of scientific experiments before being approved for use, including animal breeding and toxicity toxicology tests and identification, and have been confirmed to cause no acute, subacute or chronic harm to the human body.

Don't store it for too long: Although canned fruit has a long storage period, it also has a certain period, so if it is stored for too long, the canned fruit will spoil, such as long hairs will change color, do not eat it to avoid food poisoning.

Because there is no air in it, it is in a vacuum.

Everyone should know that eating canned fruits is easy to get cancer because of the many preservatives added to it.

Because of the addition of preservatives, it can not deteriorate.

The cans are vacuum, air-insulated and preservative-insulated.

Because there are so many microorganisms in it.

Because of the addition of various preservatives.

Because preservatives are added to canned fruits.

Pay attention to the production date: put the canned fruit that is close to the production date in a similar position, and the longer the date, you should eat it first, and eat it as soon as possible.

Once the bottle is opened, put it in the refrigerator. There is no need to vacuum.

Of course, it is recommended not to leave it for too long, and try to use it as soon as possible after disassembly, otherwise it may affect the taste.

Ordinary plastic bags because of the specific gravity is larger, ** ratio.

Du is lower, and there are more bags packed with woven bags; However, DAO is, some inner composite bags, due to their high value, can also be considered to be packed in cartons. When packing with a carton, be careful not to load it too heavy, otherwise the carton will be easy to rot if the logistics are transferred. It is recommended that when packing the carton, put a woven bag on the outside.

1. Keep the meat fresh in the refrigerator.

Raw meat keeps fresh for a long time.

2. Refrigerate pork in the refrigerator for a maximum of 2 3 days, and if the pork is frozen in the freezer compartment of the refrigerator, the storage time is up to 3 months.

3. How to preserve meat.

1. The raw meat you just bought back is wrapped in a damp cloth soaked in vinegar, which can be kept fresh for a day and night without deterioration.

2. Cut the fresh meat into pieces and fry it in oil, which can be stored for a short time.

3. Put the prepared mustard noodles and fresh meat on a plate, and then put them in an airtight container (such as a pressure cooker), which can be stored all day without the meat spoiling.

4. Put the fresh meat into the pressure cooker, steam it on the heat until the exhaust hole is bubbling, and then buckle the pressure cap valve to keep it for two days. Night.

5. Soak the fresh meat in the boiled and cooled peppercorn brine to keep it fresh for two or three days.

6. Cut the pork into cubes about 3 inches square, then coat the pork with honey, and then use a thread to string the meat and hang it in a ventilated place, which can be stored for a period of time, and the meat will taste more delicious.

7. Cook the fresh meat and put it in the freshly boiled lard while it is hot, which can be stored for a long time.

8. Cut the meat into one-centimeter-thick slices, scald it with boiling water, coat it with an appropriate amount of salt after cooling, put it in a container, seal it with a gauze, and put it in a ventilated and cool place, and it can be stored for 15 to 20 days on hot days.

9. Spray fresh meat with glucose solution, which can keep it fresh for more than one month.

10. Fresh meat is wrapped in a double-layer plastic bag or aluminum tissue paper, put it in the refrigerator freezer, and can be stored for half a year.

11. The shelf life of boxed refrigerated meat is 2 to 3 days, and it is not right to freeze it again.

12. Frozen meat should be put in the freezer and stored for 3 months.

13. Canned meat should be placed in the refrigerator; After the meat floss is opened, the storage period is about 10 days, but do not put it in the freezer to prevent the meat quality from deteriorating.

14. The cooked meat can maintain the freshness for 5 days in the refrigerator, and it can be stored in the freezer for 2 to 3 weeks.

Of course, it is fried and stored for a long time. If it is raw meat, be sure to put enough salt and keep it in the refrigerator for up to three days.