Who doesn’t remember that two-tone eraser in their school pencil case? One pink side for erasing pencils, one blue side… for what? Erasing ink? Not really. This stationery accessory actually has several often-overlooked uses. And as you’ll see, its true function is much more practical than you might think.
But what is the blue part of the eraser really for?
A misconception: no, it does not erase ink.
For years, many people believed that the blue part was designed to erase pen marks. The result: holes in the paper and a lot of frustration. It’s a bit like trying to remove a wine stain with sparkling water: the intention is good, but the result is unconvincing. In reality, this blue part was designed for very different uses… but just as interesting , especially for DIY and craft enthusiasts.
It erases pencil marks on wood
If you’re a DIY enthusiast or have ever assembled a piece of raw wood furniture, you’ve probably made pencil marks. To erase them without damaging the surface, a blue eraser is a valuable ally. It contains pumice, a granular material that acts like a gentle micro-sander . Ideal for removing pencil marks from wood without damaging it.
It also works on concrete walls
Construction professionals know this well: marking walls with a pencil is often essential for taking measurements. Once the work is finished, these marks must be removed. Thanks to its abrasive texture, the blue eraser allows them to be removed cleanly on surfaces such as concrete or plaster, where a conventional eraser would be ineffective .
It can be used on wallpaper (with caution)
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 enough—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!
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