: As paper matures, it undergoes chemical and physical changes—such as the breakdown of cellulose chains—that make it brittle.
The phrase "bend over older mature" in the context of paper likely refers to the , a field of study focused on the brittleness and structural integrity of historical documents. Key Concepts in Paper Aging and Bending bend over older mature
: 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. : As paper matures, it undergoes chemical and
: 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. : If mature paper is stressed past its