Rollerball and ballpoint pens are comparable in shape and design; however, it is the ink that is different. The rollerball uses water or gel-based ink, while the ballpoint pen uses an oil-based ink, and due to the oil, the ink dries slowly. The rollerball provides a smoother writing experience, almost like a fountain pen.
Water-based inks dry more quickly, blending the best attributes of both the fountain and the ballpoint pen. A rollerball can write as soon as a fountain pen with the convenience of a ballpoint pen. The ballpoint pen is an inexpensive writing tool whose oil-based ink lasts longer than the water-based ink fountain pens and rollerball pens.
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