Tuesday, September 15, 2026

The purpose of the blue part of a 2-color eraser

UsefulBS: Why was the rough, blue part of an eraser not actually meant for ink
UsefulBS. November 21, 2025

That infamous blue part of your eraser didn't just tear your paper by accident; its real, gritty purpose was never meant for ink at all.

I didn't know that.

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