Comment by StillLrning123

Most paper contain acid. The acid breaks down the paper. Pages become very fragile after some time(100 to 200 years?). Paperback uses cheap paper that contain acid. Paperback books will not last forever. More expensive acid free paper is often used by artists. Acid free paper is made plant fibers, but often not wood. It could be cotton. This will have a much longer life span. This paper is too expensive for most books