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18 article   /   73 Variants
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  • Roller uni-ball Eye fine
    5 Variants
    Roller uni-ball 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...
  • Roller de gel Pilot G-Tec, ultrafino
    7 Variants
    Roller de gel Pilot G-Tec, ultrafino
    from 3,00 €
    waterproof, lightfast pigment ink, interchangeable refill, metal point, transparent plastic barrel with cushioned grip and viewable ink level, cap with clip
  • Roller uni-ball Eye micro
    3 Variants
    Roller uni-ball 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
  • Roller Uni-ball UB-120
    3 Variants
    Roller Uni-ball 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 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
  • Roller de gel Pentel K118
    7 Variants
    Roller de gel Pentel 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
  • Roller Staedler Triplus
    4 Variants
    Roller Staedler Triplus
    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
  • Roller Pilot Frixion ball
    10 Variants
    Roller Pilot Frixion ball
    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
  • 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
  • Roller de gel uni-ball Impact UM 153S
    3 Variants
    Roller de gel uni-ball 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
  • Roller de gel Pentel K116
     
    Roller de gel Pentel 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
  • Roller de gel Pilot B2P
     
    Roller de gel Pilot B2P
    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
  • Minas de recambio para rollers Faber-Castell
    4 Variants
    Minas de recambio para rollers Faber-Castell
    from 2,20 €
    standard plastic refill with metal tip, archival safe per ISO 12757-2 DOC
  • Mina de recambio para rollers Lamy
    2 Variants
    Mina de recambio para rollers Lamy
    from 3,20 €
    standard metal refill
  • Roller Lamy tipo
     
    Roller Lamy 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
  • Roller uni-ball Vision RT
     
    Roller uni-ball 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
  • Roller Faber-Castell Basic
     
    Roller Faber-Castell 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
Información sobre Rollers y rollers de gel

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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