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Are gel pens also rollerball pens?
Yes, sort of. The term ‘rollerball’ is often applied to both, and a gel pen is a rollerball pen with gel ink in it. But we tend to keep them separate, so ‘rollerball’ usually means a rollerball pen with liquid ink.
If you want to be specific about it, ‘liquid-ink rollerball’ is a good term to specify.
What sort of ink is in a rollerball pen?
Liquid ink, usually very similar to fountain pen ink. There are some rollerballs that can be refilled with fountain pen ink.
What’s the difference between a rollerball pen and a ballpoint pen?
They look very similar, but there are some important differences. Even the ball itself is quite different. Ballpoints have a rough ball, that pulls the thick paste ink around to transfer it to the paper. Rollerball balls are smooth, and just allow the liquid ink to flow around them when they touch the paper. The result is a much smoother feel than a ballpoint, but they sometimes won’t write on surfaces a ballpoint will, sometimes making a mess on birthday cards. The balls can be shiny metal, but some also use ceramic balls.
How does a rollerball pen compare to a fountain pen?
They’re surprisingly similar in a few ways. The ink is very similar, and they both have a very smooth feeling on the paper. In general, a fountain pen can be smoother, and with bottled ink, can give far more choices of ink, and be cheaper to use. But a rollerball brings a lot of the convenience that made ballpoint pens so popular, while retaining some nice features from fountain pens.
Do rollerball pens use standard refills?
This is a surprisingly tricky one. A huge number of rollerballs use a refill type often known as ‘Euro format’. 111mm long, 6mm wide. But they’re not as interchangeable as you might hope. Some refills have holes in the top (especially gel versions), which won’t work in some pens; and tiny variations in width and length can make some pens fussy about what refills they’ll use. So, usually yes, but using different refills can be a little more troublesome than with most other types of refill.