JetPens®.com - Love at First Write®
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Average Customer Review
 5.0 (1 customer reviews)
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February 13, 2014
These are my favorite...
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These are my favorite refills to use in my Frixion Biz pen, which I frequently employ for lengthy math-work sessions. These are deliciously smooth refills with a brightly pigmented blue ink, and they make a satisfying medium-width line on the page without being overly bold or inky. Dries fairly quickly (3-5 seconds at most) and erases completely clean. These refills also never skip and always start up easily when you need them to. My only complaint is that the ink gets used up quickly due to its semi-viscous nature and 0.7 mm tip. The overall writing experience is so good that I don't mind paying a bit extra for all of the refills that I go through.

yoyochanny