But what is the blue part of the eraser really for?

It can be used on wallpaper (with caution)

This is a little-known but sometimes very useful trick. When you write instructions directly on a wallpapered wall, it may be necessary to remove them later. The blue eraser can do this, but with caution: its roughness requires delicate use. You should  erase lightly, without insisting , a bit like you would carefully clean an old window.

It is useful on cardboard or thick papers

In creative pursuits, erasing a grease pencil line from cardboard can be difficult. This is where the blue eraser comes in handy. Its firmer texture allows for erasing without excessive rubbing or damaging the surface.  A practical tool for those passionate about creative hobbies.

Why is it still present in school pencil cases?

Good question. Because in reality, most children only use the pink or white part, while the blue one remains intact. Yet, it continues to be sold at the start of each school year. No doubt because it has become a  stationery classic , a sort of Proust madeleine. It reassures, evokes childhood, and pleases parents, even if it is not necessarily the most suitable for school needs.

The right reflex: choose the eraser according to its use

If you’re simply looking to erase a pencil from a piece of paper, a standard eraser will be more than sufficient—and often more economical. The blue part, on the other hand, is best reserved for  more specific uses . This helps avoid waste and allows you to better adapt your equipment.

And you, did you know these real functions of the blue eraser?

Feel free to share your personal anecdotes or tips!