Technology
Why rollerball pens feel smooth but bleed through paper
HERE’S THE INTERESTING PART
While standard pens use thick paste, the premium rollerball experience relies on a fluid that constantly wants to escape. By swapping out viscous oil for thin, water-based ink, the rollerball glides smoothly because it literally bleeds a microscopic puddle into the paper fibers on contact. This is exactly why they feel so luxurious, and exactly why they ruin the other side of your notebook page.
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