First, anti-aging. The aging and fragility of books lies not in the length of time, but in how to deal with the acidic substances contained in the pages. It has been found that some books published in Europe in the15th century are well preserved up to now because the paper at that time was made of cotton and linen with neutral pH value, and calcium carbonate can prevent the formation of acid. In modern society, the circulation of books is huge, and it is obviously impossible to use cotton and linen paper, so most of them use wood as raw materials. The plant fiber in paper loses its strength and adhesion after being hydrolyzed by acid, and the acid in paper mainly comes from aluminum sulfate in pulp. When the paper begins to get wet, aluminum sulfate begins to produce sulfate and hydronium ions, and finally forms acidic substances, which corrode the paper. Sulfur oxide and cyanogen oxide in polluted air can also react with water or plant fiber itself to produce acid. Therefore, to prevent books from aging and embrittlement, the most important thing is to remove the acid from the paper. Now the most commonly used method is to soak books in magnesium bicarbonate or calcium bicarbonate solution and then dry them. This can remove the acid from the paper and prevent the acid reaction from happening again in the future.

Second, pest control. Sometimes worms grow on books, which seriously endangers the service life of books. The ways to prevent insects are: 1. The articles in the library should be clean, dry and well ventilated; There should be no cracks on bookshelves, walls or floors; 2. The temperature of books and articles should be kept at 6-20 degrees, and the humidity should be kept at 50%-60%. 3, books should be moved frequently, even books that are not commonly used should be turned over regularly; 4. On the bookshelf or bookcase, you can put some wrapped sanitary balls.

Third, decontamination. Stains on books will not only shorten the life of books, but also affect the reading effect. The decontamination method is: 1. Remove oil stains. Put a piece of absorbent paper on the oil stain and iron it gently for a few times to absorb all the oil. It can also be wiped off with a mixture of a few drops of gasoline and magnesium oxide. 2, in addition to ink marks. Put a piece of absorbent paper at the bottom of the page stained with ink marks, then soak the spots with 20% hydrogen peroxide solution or potassium permanganate solution, then put a piece of absorbent paper at the top of the page and press a heavy object, and the ink marks will disappear after drying. If there are brown spots when using potassium permanganate solution, oxalic acid or citric acid solution can be used to remove them. 3, in addition to mildew spots. Soak the cotton in ammonia water and gently wipe the mildew spots until it is clean. 4, in addition to fingerprints. Wipe off fingerprints with soap first, then wipe off soap traces with a wet cloth, and finally draw lines on the pages with absorbent paper to absorb water. 5, except flies. Dip cotton in vinegar or alcohol and gently rub it on the fly's excrement until the stain is removed.

For other common stains, as long as you carefully wipe them with soap, then wipe them off with a wet cloth, and then line the books with absorbent paper to absorb water, you can get satisfactory results.