Rollerball pens , are considered the spiritual successor to the tried and tested ballpoints, but despite being touted as better than traditional ball points, they’ve been unsuccessful at curbing the popularity of its predecessor. Which is allegedly still more popular.
A brief history on roller balls: Introduced by the Japanese company Ohto in 1963. There are primarily 2 different types of roller ball pens. The one with liquid ink, and the ones with gel ink.

The 'liquid-ink' type uses an ink transferring system that mimics that of a fountain pen, and they are designed to integrate the convenience of a ballpoint pen, with the smooth effect and reliability of a fountain pens .

Gel inks consists of pigments. They, unlike their liquid ink counterparts, are not limited to dyestuffs, as gel ink pigments would settle down in liquid ink, a process known as sedimentation. The viscosity and suspending influence of gel permits the use of pigments in gelled ink, which yields a larger assortment of livelier colors than what is conceivable in liquid ink.

This in turn also allows for the use of heavier pigments with metallic or glitter effects, or opaque pastel pigments which leave a lasting impression on darker surfaces. Although finding a unique rollerball is quite the nuisance as they’re not commonly sold over the counter. You could try your luck over at fountain pens Dubai , as they have a vast array of rollerballs as well as other pens

The main advantage liquid ink roller ball pens have over their gel counterparts is that they flow with exceptional reliability and skip less than gel ink pens do. The lesser the viscosity of liquid ink is. The more it increases the likelihood of consistently inking the roller ball, whereas the higher viscosity of gel ink tends to produces the “skipping effect”, which is the gap in writing where the ink doesn’t properly apply to the roller ball.

The main advantages a rollerball has over a ballpoint are:
Less pressure: A roller ball needs significantly less force applied to it than a ballpoint, to have it write cleanly. What this does is that this allows you to hold the pen with less stress on the hand, saving energy improving comfort, while conserving stamina altogether. This translates to quicker writing speeds, as well as longer writing sessions. (Liquid ink pens are a great example in this regard).

Superiority in choice: Typically rollerball inks have a greater range of colors due to the extensive selection of appropriate water-soluble dyes and/or to the use of pigments.

Clarity in writing: Pretty self-explanatory as the ink is more absorbent than that of fountain pens or ballpoints.
However, rollerball pens do have their fair share of flaws.

They’re more likely to smudge: Due to the fact that water-based roller ball ink dries more slowly than there ballpoint counterparts which have oil based ink, rollerballs are more susceptible to smudging. This commonly happens when someone immediately turns the page after writing, which makes it rub on the page on its opposite side, and with people who are left handed. (Using gel based ink can mitigate this to some extent.)

Author's Bio: 

Hellen Greek is an amazing SEO article writer who has contributed a great deal in branded pens and other products as she has a sheer interest in selling kaweco pens, cross ballpoint pens online on her website. Her writing style is wholly based on informative and creative writing styles.