This gel roller ball pen writes smoothly and softly – maybe the colours are not as strong as those of other roller ball pens but that is not the important factor with this Frixion ball made by the Japanese manufacturer Pilot. Frixion basically refers to friction, which is exactly what makes this pen special – the heat of friction will easily erase the ink after it is applied. That is what the eraser on the end of the barrel is there for! And it never wears out! And on most surfaces leaves absolutely no residue! Check it out!
Free-ink technology and wick reservoir
A rollerball pen is a writing utensil that, like the ballpoint pen, delivers the ink by means of a small ball at the tip. In contrast to the oil-based, viscous inks used in ballpoint pens, the water-based inks of the rollerballs have a very low viscosity which makes a light, smoothly gliding writing possible. There are two types of reservoir systems for the ink: free-ink and fibre or wick reservoirs.
In rollerball pens with free flowing ink the ink is held in a tank and is forwarded to the writing tip by means of a baffle delivery system and flows evenly onto the paper without any blotches. The baffle system serves to regulate the pressure between the tank and the surroundings thereby working as both the regulator and reservoir and providing a smooth, even flow of ink.
Wick systems store the ink in a capillary reservoir made out of polyester fibres. This system requires a certain amount of space in the barrel and can only be filled to about 70% capacity because otherwise the ink will run out of the tip. Another 30% of the ink remains stuck in the fibre storage compartment in this type of system. The free-ink system, on the other hand, uses up the entire amount of ink and is therefore able to write about twice as long with the same tank size.
A few pieces of information about the term "archival safe": Only pens with archival safe ink should be used to sign checks, credit cards, contracts, bills, etc. This designation is awarded based on tests of the ink on paper in accordance with DIN norms. Three criteria must be met:
- The script cannot be erased without damaging the paper.
- The script will remain legible even when exposed to liquids like, for example, water, alcohol or other common acids.
- The script will remain legible even when exposed to intense light rays for long periods of time.