The secret behind the unique capabilities of our pens lies in the ink cartridge itself. Our refills contain thixotropic ink and are hermetically sealed, pressurized with nitrogen gas, and feature a tungsten carbide ballpoint tip. To prevent leaks, Fisher ink is actually more of a gel than a liquid when it is at rest, but when pressure is applied to the ballpoint, the ink becomes spreadable, while still retaining the stickiness required to adhere to nearly any material.

Fisher Space Pens' popularity is due to their use by NASA during Debuting the Apollo 7 mission in 1968. Normal ballpoint pens expose the ink to air and rely on gravity – which wouldn’t work in space at zero-gravity – while our specialized ink cartridges rely on pressurized gas that won’t leak or dry up. This allows the pen to write at any angle (including upside down), in extreme temperatures (-30F to +250F), on almost any surface, underwater, through grease, and, of course, in space!

When it comes to pens, if you’re anything like us you can’t settle with just any old plastic ballpoint. You expect and deserve more from your pens - much more. To ensure the highest quality, our products are both hand- and machine-tested, so you can write confidently with the knowledge that your Fisher Space Pen will never let you down.