Traditional Culture Encyclopedia - The 24 Solar Terms - How to fill the capsule pen with ink
How to fill the capsule pen with ink
Because the ink absorption principle is that the elasticity of the capsule will return to its original state after being pressed, resulting in negative pressure in the tube, and the ink flows into the tube at atmospheric pressure, but the elasticity of the capsule is also affected by the air pressure. When the elasticity, the pressure of the ink height in the tube and the air pressure are balanced, the capsule will not return to its original state of 65,438+000%. Once the pen leaves the ink and is put down, the pressure of the ink column will be reduced and the capsule will continue to recover. At this time, air will also be sucked in, causing bubbles to appear. Therefore, only by vacuumizing the pen tube and then putting the whole pen tube into the ink can the ink be completely filled without leaving bubbles.
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