@bungustore: Pen ink is about 10,000 times thicker than water. Almost like honey. That's why it doesn't fall out when you flip a pen upside down. The tiny ball in the tip spins and pulls a thin film of ink onto paper like a mechanical pump. No spin, no ink, no leak. But torch it and the ink keeps burning. Because oil-based ink is basically fuel. Heat destroys the thickness, the trapped air expands, and the pen pushes ink out on its own. That's also why pens leak in hot cars and on airplanes.

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Monday 01 June 2026 15:17:28 GMT