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Extracting ink from 1,000 pens

Ink is chemically extracted from 1,000 pens to measure pigment yield and see how much usable ink can actually be recovered at ...

In 1931, a journalist noticed that newspaper ink dried faster than his pen, which led to the invention of the ballpoint pen

While reporting on the latest stories, Hungarian journalist László Bíró found himself frustrated by the black smudges left by ...