Almost all of the books published in the past 150 years were printed on acidic paper  Unfortunately, every kind of acidic paper gradually destroys itself due to its very acidity  This process of deterioration can be slowed if the books are stored in a cool, dry environment
Techniques, which are now being developed, to deacidify books will probably be applied only to books with historical significance
If a book was published in the past 150 years and is historically insignificant, it will probably deteriorate completely.