How do erasers actually work? It’s more complicated than you think |
Pencil marks, composed of graphite flakes, adhere to paper fibers through weak van der Waals interactions. Image Credit: Wikimedia Commons A new sheet of paper is a blank canvas, but a microscope shows that it’s a wild, tangled jungle of cellulose fibres. “Every time you drag a pencil across that grid, you’re causing a little…
