The roller pens have two basic advantages: firstly less pressure is needed to be applied while writing and it offers clean and neat writing. Secondly the roller pens are found having bright and different colored inks. Hence roller pens are pens having ball point writing mechanism with liquid and gelled ink. The roller pens having less sticky ink are easily saturated. These qualities have given roller pens a unique distinction.
Disadvantages of Roller Pens: Roller pens have certain disadvantages too these are; firstly due to water soluble inks the chances of smudging up of roller pens become more as water based inks take time to dry. Secondly, if written on thin paper the ink may ooze so thick papers must always be used which can prevent inking. Other point is that usually roller pens do not last long because the water based ink destroys more quickly.
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