Does Matter Matter in Crumpled Matter?

Crumpling a sheet creates a potentially useful type of material with properties that arise from the confined state of the thin sheet. Over the years, researchers studying crumpled matter have revealed that the compressive strength can be described by a power law, but there is not yet consensus on a minimal physical model for the experimental observation. Recently, it has been shown that truly elastic sheets show similar behaviour to plastic sheets. Is this a sign of universality, a accident of the limited materials studied, or a result of incomplete observation? Here we introduce a large set of data spanning 11 different physical materials as well as data from simulations of graphene sheets. The work shows what does, and what does not correlate with the varied responses of each material with applied stress.