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18 article   /   73 Variants
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  • Uni-ball rollerball pen Eye fine
    5 Variants
    Uni-ball rollerball pen Eye fine
    from 2,00 €
    roller ball in metal socket, line width 0.4 mm, water-based, archival safe ink (red, medium blue, black), waterproof, tungsten-carbide ball, line thickness is 0.4 mm, plastic barrel with ink level window, plastic cap...
  • Pilot gel rollerball G-TEC, ultra-fine
    7 Variants
    Pilot gel rollerball G-TEC, ultra-fine
    from 3,00 €
    waterproof, lightfast pigment ink, interchangeable refill, metal point, transparent plastic barrel with cushioned grip and viewable ink level, cap with clip
  • Uni-ball rollerball pen UB-120
    3 Variants
    Uni-ball rollerball pen UB-120
    from 1,80 €
    roller ball in metal socket, water-based ink, line width 0.2 mm, plastic barrel with metal clip
  • Uni-ball rollerball pen Eye micro
    3 Variants
    Uni-ball rollerball pen Eye micro
    from 2,00 €
    roller ball in metal socket, line width 0.3 mm, water-based, archival safe ink (ISO 12757-2 DOC), waterproof, plastic barrel with ink level window, colour-coded cap with metal clip
  • Pentel gel rollerball K118
    7 Variants
    Pentel gel rollerball K118
    from 1,90 €
    waterproof, lightfast pigment ink, for light and dark paper, interchangeable refill, metal point, line width 0.4 mm, transparent plastic barrel with cushioned grip and viewable lnk level, cap with clip
  • Pilot Frixion ball erasable gel pen
    10 Variants
    Pilot Frixion ball erasable gel pen
    from 2,60 €
    replaceable refill, roller ball in metal socket, line width 0.4 mm, water-based ink, erasable, rubberized grip, plastic barrel, cap with clip, rubber eraser at the top end of barrel
  • Paper Poetry gel rollerball pen
     
    Paper Poetry gel rollerball pen
    from 1,50 €
    transparent plastic barrel with a (visible) refill cartridge that is divided into 6 sections with rainbow colours, for light and dark paper, metal tip, line width is 0.8 mm, transparent cap
  • Uni-ball gel rollerball pen Impact UM 153S
    3 Variants
    Uni-ball gel rollerball pen Impact UM 153S
    from 2,50 €
    waterproof, lightfast water-based pigment ink, interchangeable refill, metal point 1 mm (broad), plastic barrel with cushioned grip and viewable ink level, plastic cap with clip
  • Uni-ball Sigmo UM 153 gel pen
    9 Variants
    Uni-ball Sigmo UM 153 gel pen
    from 3,00 €
    waterproof, lightfast water-based pigment ink, metal point 1 mm (broad), transparent plastic barrel with cushioned grip and viewable lnk level, transparent plastic cap with clip in the color of the ink
  • Staedtler Triplus roller
    4 Variants
    Staedtler Triplus roller
    from 1,15 €
    roller ball in metal socket, line width 0.3 mm, dry-safe water-based ink, silver ergonomic polypropylene triangular barrel, cap with clip is the colour of the ink
  • Refill for Faber-Castell rollerball
    4 Variants
    Refill for Faber-Castell rollerball
    from 2,20 €
    standard plastic refill with metal tip, archival safe per ISO 12757-2 DOC
  • Refill for Pilot Frixion rollerball pens
    10 Variants
    Refill for Pilot Frixion rollerball pens
    from 5,50 €
    Ink type: correctable ink, Tip: roller tip in metal socket, Line width: 0.4 mm, roller ball diameter is 0.7 mm
  • Lamy rollerball pen, tipo
     
    Lamy rollerball pen, tipo
    from 5,50 €
    replaceable refill, roller ball in metal socket, water-based ink, ribbed plastic grip, polyoxymethylene (POM) or anodized aluminium barrel, spring clip (plastic), compatible refill: Lamy M 66, Design: Wolfgang Fabian
  • Pentel gel rollerball K116
     
    Pentel gel rollerball K116
    from 2,00 €
    waterproof, lightfast, pigment ink, interchangeable refill, metal point, line width 0.3 mm, transparent plastic barrel with cushioned grip and viewable ink level, cap with clip
  • Lamy rollerball pen refill
    2 Variants
    Lamy rollerball pen refill
    from 3,20 €
    standard metal refill
  • Faber-Castell rollerball pen, Basic
     
    Faber-Castell rollerball pen, Basic
    from 24,00 €
    interchangeable refill, roller ball in metal socket, line width is 0.7 mm, free-flowing, water-based ink (runs to the last drop), metal shaft, plastic rip, grey cap with plastic clip
  • Pilot B2P gel roller ball pen
     
    Pilot B2P gel roller ball pen
    from 2,40 €
    waterproof, lightfast pigment ink, interchangeable refill, 0.5 mm roller ball in metal socket, line thickness 0.3 mm, transparent plastic barrel with push-button, plastic clip
  • Uni-ball rollerball pen Vision RT
     
    Uni-ball rollerball pen Vision RT
    from 3,10 €
    replaceable refill, metal roller-ball, line width is 0.5 mm, water-based, archival safe ink (ISO 12757-2 DOC), plastic barrel with ink level window, pocket safe retraction mechanism
Information about Ballpoint & Gel Pens

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.
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