Wrapped in plastic wrap, the effect is similar to plastic wrap. Wrap it in plastic wrap and put it in a box or on a bookshelf. This is mainly related to the acidity of book paper and your storage conditions. You will find that not every book is yellow when put together, which is the reason. It is a better way to wrap the book cover with kraft paper. Practice tells me that wrapping the cover with kraft paper can keep the cover of newsprint from yellowing for at least 20 years, and the inside pages are relatively white. The other is to avoid direct sunlight, dryness, ventilation and less dust. The humid weather in the south is the enemy of book storage, so it is very important to prevent moisture. Aromatherapy helps. Dust with a feather duster every day. I will cover the gap between the bookcase and the book with paper, which can also prevent dust and sun, and the effect is good. There is also frequent flipping through books and moving books. Books are for reading, so I don't like sealing boxes. Dust with a feather duster every day. I will cover the gap between the bookcase and the book with paper, which can also prevent dust and sun, and the effect is good. There is also frequent flipping through books and moving books. Books are for reading, so I don't like sealing boxes. Every once in a while, it should be suitable for you to take it out and bask in the sun. Just try it. It should work.