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      HomePenne e Pennarelli per la scritturaPenne a sfera e a gel

      Penne a sfera e a gel

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      18 article   /   81 Variants
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      • Penna roller uni-ball Eye fine
        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...
        10 Variants
        Penna roller uni-ball Eye fine
        from 2,00 €
      • Penna gel Pilot G-TEC, ultrafine
        waterproof, lightfast pigment ink, interchangeable refill, metal point, transparent plastic barrel with cushioned grip and viewable ink level, cap with clip
        7 Variants
        Penna gel Pilot G-TEC, ultrafine
        from 3,00 €
      • Penna roller ad inchiostro Uni-ball UB-120
        roller ball in metal socket, water-based ink, line width 0.2 mm, plastic barrel with metal clip
        3 Variants
        Penna roller ad inchiostro Uni-ball UB-120
        from 1,80 €
      • Penna gel Pentel K118
        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
        7 Variants
        Penna gel Pentel K118
        from 1,90 €
      • Penna roller uni-ball Eye micro
        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
        3 Variants
        Penna roller uni-ball Eye micro
        from 2,00 €
      • Uni-ball Sigmo UM 153 gel pen
        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
        9 Variants
        Uni-ball Sigmo UM 153 gel pen
        from 3,00 €
      • Paper Poetry gel rollerball pen
        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
         
        Paper Poetry gel rollerball pen
        from 1,50 €
      • Penna roller ad inchiostro Pilot Frixion ball
        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
        10 Variants
        Penna roller ad inchiostro Pilot Frixion ball
        from 2,60 €
      • Penna gel-roller Pilot Gel B2P
        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
         
        Penna gel-roller Pilot Gel B2P
        from 2,40 €
      • Penna gel uni-ball Impact UM 153S
        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
        3 Variants
        Penna gel uni-ball Impact UM 153S
        from 2,50 €
      • Refill for Pilot Frixion rollerball pens
        Ink type
        correctable ink
        Tip
        roller tip in metal socket
        Line width
        0.4 mm, roller ball diameter is 0.7 mm
        10 Variants
        Refill for Pilot Frixion rollerball pens
        from 5,50 €
      • Penna roller ad inchiostro Lamy tipo
        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
        3 Variants
        Penna roller ad inchiostro Lamy tipo
        from 5,50 €
      • Penna roller Staedtler Triplus roller
        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
        4 Variants
        Penna roller Staedtler Triplus roller
        from 1,10 €
      • Ricariche per penne roller Faber-Castell
        standard plastic refill with metal tip, archival safe per ISO 12757-2 DOC
        4 Variants
        Ricariche per penne roller Faber-Castell
        from 2,20 €
      • Penna roller uni-ball Vision RT
        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
        2 Variants
        Penna roller uni-ball Vision RT
        from 3,10 €
      • Ricambio penna roller Lamy
        standard metal refill
        2 Variants
        Ricambio penna roller Lamy
        from 3,20 €
      • Penna roller ad inchiostro Faber-Castell, Basic
        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
         
        Penna roller ad inchiostro Faber-Castell, Basic
        from 24,00 €
      • Penna gel Pentel K116
        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
         
        Penna gel Pentel K116
        from 1,95 €
      Page 1 of 1
      Informazioni su Penne a sfera e a 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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