I’m one of those people who thought the blue part of the eraser was for erasing pen ink, but no, here’s what it’s for
Long shrouded in mystery in classrooms, the two-tone eraser has fueled a persistent misconception: that its blue side can erase pen ink. In reality, its function is quite different… and much more surprising than you might think. Who hasn’t held this famous two-tone eraser, pink …









