abrasion
The rubbing or wearing away of a material due to
contact with another material. Some very large
books, manuscripts, etc., may be damaged by
abrasion because of the large surface area of the
leaves rubbing over one another (particularly when
the publication is being opened or closed), as may
the leather coverings of books when they are
removed from the shelves. Dust also, is a
significant cause of abrasion of book papers and
covers.