Space Pen Pressurised Refills 'Space Pen Pressurised Refills - Bold Point - Blue'

SPR1B

Fisher’s Sealed, Pressurized Ink Cartridge Ordinary ball pens rely on gravity for ink fl ow, but Fisher's Space Pen cartridge, pressurized at nearly 35 pounds per square inch, feeds ink continuously to the tungsten carbide ball, allowing the user to write at any angle, even upside down. This advancement required the development of a new and special ink. The new visco-elastic, thixotropic ink, with a consistency similar to that of thick rubber cement, fl ows as a result of the shearing action of the rolling ball in its socket. The shearing action liquefi es the solid gel thixotropic ink, allowing the pen to write smoothly and dependably on most surfaces and even underwater. Evaporation, wasted ink and back leakage are eliminated. Shelf-life is increased to an estimated 100 years.

£4.25

Space Pen Pressurised Refills 'Space Pen Pressurised Refills - Fine Point - Blue'

SPR1F

£4.25

Space Pen Pressurised Refills 'Space Pen Pressurised Refills - Medium Point - Blue'

SPR1

Fisher’s Sealed, Pressurized Ink Cartridge Ordinary ball pens rely on gravity for ink fl ow, but Fisher's Space Pen cartridge, pressurized at nearly 35 pounds per square inch, feeds ink continuously to the tungsten carbide ball, allowing the user to write at any angle, even upside down. This advancement required the development of a new and special ink. The new visco-elastic, thixotropic ink, with a consistency similar to that of thick rubber cement, fl ows as a result of the shearing action of the rolling ball in its socket. The shearing action liquefi es the solid gel thixotropic ink, allowing the pen to write smoothly and dependably on most surfaces and even underwater. Evaporation, wasted ink and back leakage are eliminated. Shelf-life is increased to an estimated 100 years.

£4.25