The Fisher Space Pen Company manufactures the Space Pen, which is a specially designed writing utensil that uses pressurized ink cartridges capable of writing in zero gravity, underwater, over wet greasy paper, at any angle, and in various temperatures. They are used by astronauts aboard the ISS as well.
How does it work in zero gravity? Well, the ballpoint itself is made from tungsten carbide and is precisely fitted in order to avoid leaks. There’s a sliding float separating the thixotropic visco-elastic ink from the pressurized gas. The ink in the hermetically sealed and pressurized reservoir is capable of writing for three times longer than a standard ballpoint pen. That’s right, it can write at altitudes up to 12,500 feet, thanks to the ink being forced out by compressed nitrogen at a pressure of nearly 45 psi. Operating temperatures can range from −30 to 250 °F, even without the help of gravity, at any angle to boot.
Fisher Space Pen Original Astronaut Space Pen, AG7 Series, Ballpoint, Chrome, Black Ink, Gift Box
- A Pen Designed to Last: The Original Astronaut Pen was used by the astronauts of Apollo 7 and has been used on all manned space flights since and nearly identical to the one taken to the moon in 1969
- Write at any Angle: Fisher Space Pens are versatile and practical ballpoint pens that can smoothly write at any angle, even upside down with reliable performance on almost any surface
- Write in Extreme Temperatures: All Fisher Space Pens write in extreme temperatures ranging from -30°F to 250°F (-34° to +121°C), underwater, in space or any other harsh environment