The paper is oxidized. Generally, paper turns yellow because it has been in contact with air for a long time, which leads to oxidation. The paper that is often exposed to the sun will turn yellow faster, and the infrared rays in the sun will heat the paper, make the paper warm, and accelerate the yellowing, brittleness and degradation of the paper edge.
Daily use should pay attention to:
1, keep clean, especially don't read while eating, to avoid being polluted by cooking oil and other things. We should also clean the bookcase regularly, sweep away dust and keep books away from pests.
2, avoid folding, when the book is aging, the crease will become a place that is easy to become brittle, and the bookmark can be used as a page turning mark.
3. Don't pile up books. Books are more susceptible to moisture after being stacked.
How to keep books for a long time?
First of all, make sure that it is dry and clean. Don't put water or food on the table. Make sure your hands are dry before turning over the books to prevent them from getting dirty and wet.
Secondly, the place where books are stored should be cool and dry to avoid exposure to the sun.
Then, use bookmarks more, and don't fold the pages.
Then in order to keep the book flat, you can press it with a clean and dry weight.
Finally, books that need long-term storage can be sealed with plastic bags.
What if the book is wet?
1, brush for dust removal: you can brush the outside of the book first to remove dust and mildew.
2, sandpaper to remove macula: You can use 150-200 sandpaper to gently remove the macula of the book.
3. Fold the book: when the book is wet, the inside pages will stick. If the side is slightly stuck, don't open the inner page first, gently fold the book into an arc, and fold it several times to separate the inner pages.
4. Self-adhesive remover: If the adhesion is serious, you can use the self-adhesive remover to brush the self-adhesive remover on the sticky part of the book, so that the paper can slowly separate the inner pages after being absorbed.
5, toilet paper dehumidification: books that are wet by rain can make the wet part clip into toilet paper page by page. After clamping, find a bigger and heavier book to press on it, and let it dry overnight. If it is not completely dry, put on new toilet paper and continue to press it overnight.