- can write at any angle and extreme
cold or heat.
- pressurized with nitrogen (doesn't rely on gravity).
- tungstun carbide ball point that lasts for 3 lifetimes.
- requires less ink to write a smooth and bold line.
- features a sealed ink cartridge that is pressurized.
- contains a visco elastic thixotrpic solid gel ink.
- shearing action of the rolling ball liquefies the ink.
- ink flows when you want it instead of all the time.
Originally (and famously) designed for use on space flights,
this pressurized space pen writes in freezing cold (-30°F),
boiling heat (+300°F), the gravity free vacuum of space,
underwater, over most grease and even upside down. Still
used on American and Russian manned space flights today.
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