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The truth behind NASA spending money on pen research in the universe
It turns out that the story you have heard for so long is just a trick. The real story is hundreds of times more interesting!
Ball Pen
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Articles about Ball Pen
3 published items.
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Chemical components of blue ballpoint pen ink
Blue ball pen ink includes dye, fatty acid and alcohol to ensure uniform ink, quick drying and paper sticking.
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Pen draws the circuit on paper
A group of professors and students at the University of Illinois at Urbana-Champaign, USA, invented a rollerball pen with silver ink, which helps draw electrical circuit…