How to prevent yellowing of the pages of a book collection? How to prevent books from yellowing?

Seal with plastic film to avoid exposure to air.

For private book collectors, it is especially necessary to solve the following three problems that affect the life of books:

1. Anti-aging. The aging and brittleness of books does not depend on the length of time, but on how to deal with the acidic substances contained in the pages. It has been found that some of the books published in Europe in the 15th century have survived to this day because the paper was made of cotton and linen heads, had a neutral pH, and contained calcium carbonate, which prevents acid formation.

In modern society, the circulation of books is very large, and it is obviously impossible to make paper from cotton and linen, so most of them use wood as raw material. The plant fibers in the paper lose their strength and adhesion when hydrolyzed by acid, and the acid in the paper mainly comes from the aluminum sulfate that sizes the paper. When the paper starts to get wet, the aluminium sulphate begins to produce sulphate and hydronium ions, and finally forms an acidic substance that erodes the paper.

Sulphur oxide and cyanide oxide in polluted air can also react with water or plant fibers to produce acids. Therefore, to prevent books from aging and becoming brittle, the main thing is to remove the acid in the paper. The most common method now is to soak the book in a solution of magnesium bicarbonate or calcium bicarbonate and then dry it.

By doing so, you can get the acid in the paper and prevent the acid reaction from happening later.

2. Insect control. Sometimes small insects grow on books, which seriously jeopardizes the lifespan of books. The way to prevent insects is:

1. The articles in the collection should be clean and dry, and well ventilated; There should be no cracks in the bookshelves, walls, or floors; 2. The temperature of the collection of books and articles should always be kept at 6-20 degrees, and the humidity should be kept between 50% and 60%; 3. The collected books should be moved frequently, even if they are not commonly used, they should be turned regularly; 4. On the bookshelf or in the bookcase, you can put some wrapped sanitary balls.

3. Decontamination. Stained books will not only shorten the life of the book, but also affect the effect of reading. The method of decontamination is:

1. Degreasing. Put a piece of absorbent paper on the oil stain and gently iron it several times with an iron to absorb the oil. It can also be erased with a few drops of a mixture of gasoline and magnesium oxide.

2. Ink removal. At the bottom of the page stained with ink, first pad a sheet of absorbent paper, then soak the stain with 20% hydrogen peroxide solution or potassium permanganate solution, then put a piece of absorbent paper on the top of the page, and press a heavy object, and the ink will disappear after drying. If brown spots occur with a potassium permanganese solution, they can be removed with oxalic acid or citric acid solution.

3. Remove mildew. Dip cotton in ammonia and gently rub the mold until it is removed. 4. Remove finger prints.

Rub your fingerprints with soap, then wipe off the soap with a damp cloth, and finally line the pages with absorbent paper to blot the water. 5. Remove fly feces. Dip cotton in vinegar or alcohol and gently rub fly stool until the stain is removed.

For other general stains, as long as you carefully wipe it with soap, then wipe off the soap with a damp cloth, and then line the book with absorbent paper to absorb the water, you can get a more satisfactory effect.

Seal it with an opaque vinyl bag.

Books such as bookshelves and bookcases should be placed in a dry and ventilated place. All kinds of light are harmful to books, especially daylight. Therefore, the bookshelves should be protected from direct sunlight.

For books that have been damp and waterlogged, the method of ventilation and drying should be adopted, and they must not be exposed to sunlight to prevent the writing from turning yellow and brittle. Books should be protected from insects. Bookshelves and bookcases can be placed with some sanitary balls wrapped in paper.

Natural camphor. Sperm mass, camphor powder and other harmless insect drugs; In addition, books should be frequently overturned, and books and periodicals that are eaten by insects and rats should be dealt with in a timely manner to prevent the spread. When the books are placed, hardcover books and paperback books can be placed with the spine facing outwards for easy finding.

When placed, if the layer is not full, you can put a book file to avoid the book being loose and crooked, causing the back of the book to be bent and the pages to be curled. Wire-bound books are lighter and should not be placed directly. It is also better to lay flat the thread-bound book with a letter sleeve.

Format. Large books (e.g. journals and magazines) should not be shoehorned into low shelves. Keep bookshelves and bookcases clean. Dust not only contaminates books, but also causes moths and mildew.

Damaged books should be repaired in time, especially the wrinkles in the corners of the books, and they should be leveled at any time. To remember to see a page of the book, use bookmarks, not fold corners. Books and periodicals with finger marks can be soaked in cotton soaked in soapy water and scrubbed once or twice, and then the water is blotted dry with absorbent paper.

If there is an ink stain, use absorbent paper to pad the page under the inked page and soak it in hydrogen peroxide.

The cotton ball is gently scrubbed, then covered with a sheet of absorbent paper, and several thicker books are pressed on the paper, and when the pages are dry, the ink will disappear. Books and periodicals are damp and mildew, and can be soaked in alum.

Scrub with a cotton ball of water and then blot the water with absorbent paper.

Generally, the yellowing of book paper is due to oxidation. If you can avoid oxidation as much as possible, you can also avoid the yellowing of the paper.

As long as you can ensure the following three points, the yellowing of the paper can basically be avoided.

These three points are to reduce contact with air, reduce contact with moisture, and reduce contact with sunlight.

Mold is common in food, because it contains a certain amount of starch and protein, plus more or less water, so as to meet the conditions required for the growth and development of mold, which is generally the cause of moisture, coupled with the appropriate daily temperature, to lead to the phenomenon of mold.

The most important thing about the mold of books is that they are damp, and when the water activity value is low, the mold cannot absorb water, so it is the key to avoid the books being exposed to moisture. As for the temperature, the most suitable temperature for most mold growth is 25 to 30, so those who have the conditions can keep the library at 6 to 20, and at the same time keep the indoor air dry and ventilated.

Do not put it in a place with strong sunlight, in addition, it is recommended to put it in a cabinet door, which is better and reduces wind and dust.

Turning over the bookcase often The bookcase is hidden for a long time, which is easy to create conditions for pests to settle and breed. As the saying goes: Flowing water is not rotten, and the hub is not beetle. In general, the books should be thoroughly turned and cleaned in late spring and autumn every year, and the bookcases and bookcases should be swept once.

How to prevent the secretary from yellowing? Books must be isolated from the air, so that the books will not turn yellow.

How to prevent the yellowing of the collection of books The yellowing of the collection of books is one of the important characteristics of the aging and deterioration of books. The reasons for this are many and complex. According to the research results of recent years and relevant data, the factors that cause yellowing of the book paper itself are:

1.The paper is not washed cleanly during production, and there is a water-soluble one'Colored substances, which are easy to turn yellow when placed in the air for a long time. 2.

The paper itself has a large acid content, and the degradation of cellulose accelerates in the long-term storage, and the cellulose content increases, and the paper is easy to turn yellow. 3.Paper contains metals such as copper and iron, which promote the yellowing of the paper.

4.Paper contains more lignin and hemicellulose, and it is easy to turn yellow after light and oxidation. The factors that cause the collection to turn yellow due to external conditions are:

1.Exposure to light, especially daylight and fluorescent lamps. 2.

Corrosion of acidic and oxidizing gases in the air. 3.The role of high temperatures.

4.Effect of high humidity. 5.

Fouling of dust. 6.The collection of books is mildew, and so on.

It should be pointed out here that the yellowing of books is closely related to deterioration, therefore, the yellowing of books is one of the important characteristics of deterioration, which is also accompanied by the change of physical and chemical properties such as the reduction of the degree of cellulose polymerization of paper, the minimum decrease of cellulose content, the increase of cellulose content, the increase of copper value, and the decrease of strength. To prevent the yellowing and deterioration of the paper in the collection, the following measures can generally be taken. 1.

The library should generally be located in a shady room to prevent direct sunlight. 2.It is best to use incandescent lamps for lighting in the library (it is better to add lampshades) and do not use fluorescent lamps for lighting, because fluorescent lamps contain more ultraviolet rays.

3.Store the collection in the book rejection to protect it from direct sunlight and dust. 4.

Keep the precious books in the people's envelope. 5.The bookcase is sealed in the high temperature and humidity season in summer, and the cabinet door is opened for ventilation for about 2 hours every day in autumn, which also has a good effect of preventing high temperature and humidity.

6.After the collection of books is damp, insect-grown, moldy or immersed in water, it must not be exposed to the sun, nor can it be baked with electric stoves, stoves, ovens, and it is best to use low-temperature treatment. 7.

Deacidify acidic books. 8.When buying books, if there are several paper prints at the same time, choose paper books that are not easy to return to yellow.

The order in which the paper returns to yellowing is as follows: newsprint, letterpress, offset paper, and handmade paper. ;

Put it in a dry and ventilated place, and take it out to dry it after a long time, so it will be better.

Dry and ventilated, take it out to dry once or twice a year. Depending on the region, dehumidifiers are used if conditions permit.

Whether you want to be sunburned or not?