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      Penne a sfera e a gel

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      18 Articolo   /   72 Varianti
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      Classificazione: Rilevanza
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      • Penna roller uni-ball Eye fine
        4 Varianti
        Penna roller uni-ball Eye fine
        da 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...
      • Penna gel Pilot G-TEC, ultrafine
        7 Varianti
        Penna gel Pilot G-TEC, ultrafine
        da 3,00 €
        waterproof, lightfast pigment ink, interchangeable refill, metal point, transparent plastic barrel with cushioned grip and viewable ink level, cap with clip
      • Penna roller uni-ball Eye micro
        3 Varianti
        Penna roller uni-ball Eye micro
        da 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
      • Penna roller ad inchiostro Uni-ball UB-120
        3 Varianti
        Penna roller ad inchiostro Uni-ball UB-120
        da 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 Varianti
        Uni-ball Sigmo UM 153 gel pen
        da 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
      • Penna gel Pentel K118
        7 Varianti
        Penna gel Pentel K118
        da 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
      • Penna roller Staedtler Triplus roller
        4 Varianti
        Penna roller Staedtler Triplus roller
        da 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
      • Penna roller ad inchiostro Pilot Frixion ball
        10 Varianti
        Penna roller ad inchiostro Pilot Frixion ball
        da 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
        da 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
      • Penna gel uni-ball Impact UM 153S
        3 Varianti
        Penna gel uni-ball Impact UM 153S
        da 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
      • Ricambio penna roller Lamy
        2 Varianti
        Ricambio penna roller Lamy
        da 3,20 €
        standard metal refill
      • Penna gel-roller Pilot Gel B2P
         
        Penna gel-roller Pilot Gel B2P
        da 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
      • Penna roller uni-ball Vision RT
         
        Penna roller uni-ball Vision RT
        da 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
      • Refill for Pilot Frixion rollerball pens
        10 Varianti
        Refill for Pilot Frixion rollerball pens
        da 5,50 €
        Ink type: correctable ink, Tip: roller tip in metal socket, Line width: 0.4 mm, roller ball diameter is 0.7 mm
      • Penna gel Pentel K116
         
        Penna gel Pentel K116
        da 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
      • Ricariche per penne roller Faber-Castell
        4 Varianti
        Ricariche per penne roller Faber-Castell
        da 2,20 €
        standard plastic refill with metal tip, archival safe per ISO 12757-2 DOC
      • Penna roller ad inchiostro Faber-Castell, Basic
         
        Penna roller ad inchiostro Faber-Castell, Basic
        da 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
      • Penna roller ad inchiostro Lamy tipo
         
        Penna roller ad inchiostro Lamy tipo
        da 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
      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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