One question I am often asked is how to remove ball point pen ink from a leather chair or couch. According to the International Fabricare Institute, removing ink from leather furniture is not easy.

Pilot’s Frixion series of groundbreaking erasable-ink pens became international bestsellers following their launch in 2006. Frixion products have now sold a total of 1.5 billion units worldwide. Forms ...

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At its most basic, a pen has to do just one thing, but there are so many reasons to choose one over another. Does it glide along the page, or does it drag? Does the ink flow in a smooth line, or is it ...

The ballpoint pen, which is used in homes, workplaces, schools, and other places where people write, is arguably the most common tool in our daily lives. Its invention transformed the way we write in ...

You probably have no idea where the ink in your pen comes from, much less whether it’s a simple factory process or demanding of more expertise. Josh Velson, a chemical engineering consultant for bio ...