: As paper matures, it undergoes chemical and physical changes—such as the breakdown of cellulose chains—that make it brittle.
: Researchers use nondestructive tests, like the cantilever test , to measure how much a strip of "mature" or aged paper can bend before it reaches its elastic limit. bend over older mature
: If mature paper is stressed past its elastic limit or held in a bent position for a long time, the fibers shift permanently, causing the paper to stay bent even when the stress is removed. : As paper matures, it undergoes chemical and
The Bending Mechanics of Aged Paper - ASME Digital Collection : As paper matures