21 Everyday Things You Never Knew Even Had A Purpose

What's that mysterious blue side of an eraser for?

You've always heard that it could erase pen ink. Well, it can. But it only really works on very strong, thick paper.The blue side is harder and more abrasive that the softer pink side, and takes a lot more paper off when you use it, which is why you've probably erased clean through the paper any time you've tried to use it.