Ink color : Black, Red, Blue- Friction Ballpoint Pen - Equipped with friction ink that makes the ink colorless by temperature changes. The frictional heat generated by rubbing with the erasing rubber on the top changes the color of the ink to colorless, al
Ink color : Black, Red, Blue- Friction Ballpoint Pen – Equipped with friction ink that makes the ink colorless by temperature changes. The frictional heat generated by rubbing with the erasing rubber on the top changes the color of the ink to colorless, allowing you to erase handwriting.
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