And thus the invention of the Fisher Space Pen. http://www.spacepen.com/ http://www.spacepen.com/ Rubber that, under the pressure inside of the ink cart, is l

And thus the invention of the Fisher Space Pen. http://www.spacepen.com/ http://www.spacepen.com/ Rubber that, under the pressure inside of the ink cart, is liquid, but when finally written onto paper, becomes solid instantly and cannot be smeared. I've had one for years, and it is the smoothest and best pen I've ever owned.