The Sharpie Tank Style markers are optimized for environments where a high volume of highlighting is required. The "Tank" reservoir holds about 2.4 times more ink than standard slim-line markers, making it a workhorse for students or professionals. The chisel tip is made of bonded polyester fiber, designed to hold its 45-degree angle even under firm pressure.
The body is made of high-density polypropylene for durability. The Smear Guard ink is a specialized formula that helps prevent the smudging of many pen and printer inks. To keep the markers from drying out, it is helpful to ensure the cap is "double-clicked" into place, as a single click may not always create a complete seal. Each unit is tested to provide over 200 meters of marking.
While the 16mm barrel diameter provides a large ink supply, it may feel broad for some users. The quick-dry formula is intended to prevent visibility on the back of standard copy paper, though very thin pages may show some saturation. These markers are also sensitive to significant pressure changes, so they should be monitored if used during air travel.
For a kit that includes both highlighters and permanent markers for various labeling needs, you might consider the Sharpie Permanent Marker Variety Pack.
High-volume marking tools are essential for a well-stocked home office, and more options can be found in the highlighter marker assortments section.
