Dust avoidance refers to the ubiquitous dust, especially at present, the dust in the air is increasing day by day, so it is necessary to pay more attention to the dust prevention and removal of books. Dust accumulation on books not only pollutes books, but also makes the air between pages not circulate. In addition, dust itself is also a hiding place and breeding ground for insects and molds. Therefore, books must be kept in a relatively clean environment and cleaned frequently.
Fiber components in moisture-proof paper, or harmful substances such as acid-base bleaching powder remaining in paper, will accelerate the change of paper under the influence of high temperature. In addition, humidity is a favorable environment for insects and molds, which is harmful to books. The simple moisture-proof method is to ventilate the book as much as possible on sunny days with low temperature, seal it as much as possible on wet days, or place desiccant.
There are many pests that damage books, such as moths, booklice, termites, moths and butterflies, cockroaches and so on. Among them, bacteria and fungi in microorganisms are the most harmful. They are attached to the paper and cover materials of books, which will destroy the structure of the paper and damage the paper and cover materials due to chemical action.
There are many ways to prevent insects. For families, it is simple and practical to pack bhc powder into flat packets and put them in bookshelves or bookcases, or in pages with holes. This method has special effects on thread-bound books of ancient books. Camphor also has a good insect repellent effect. Books that have been infected by microorganisms or moldy can be disinfected and wiped with formalin.
Avoid light books are not only afraid of sunlight, but also of fluorescent lights. Because the ultraviolet rays in the light will age the paper, the yellowing of the paper is mostly caused by ultraviolet rays. So in order to protect the book, don't let the sun and fluorescent lamps shine directly on the book. You can filter ultraviolet rays through window glass or transparent plastic, and then shine them on books. Especially when reading precious books or books that you cherish especially, you may wish to take this protective measure. In order to avoid light, the bookcases and bookshelves of books are placed in the sun and the back light, or covered with curtains, which often puts books in the dark.
Avoid heat alone, the book is not afraid, but a certain temperature plus humidity, resulting in the conditions of insects and mildew. Therefore, the general collection places always require low temperature or air conditioning, especially precious books. Letters from home also pay attention to the choice of place. For books, the room facing south is not as good as the room facing north.
Avoid a book that is too heavy, the air between pages can't circulate, and it is easy to stick between pages. This situation is often because the collection space is too small and the books have to be built very high. The more realistic way to solve the problem is to turn it over frequently, and don't leave a book under for many years.