Ceramic tip pens

OHTO

• OHTO C-300 Ceramic Rollerball Pen Refill OH10640, 3 sizes, 3 colors, Cult Pens £1.96
• OHTO Tasche Ceramic Rollerball Pen CB-10T OH14991, Rollerball version of the popular compact Tasche range, £11.99
• Review: The Pen Addict, Ohto Tasche Ceramic Rollerball

KYOCERA

• Kyocera uses OHTO ceramic refills
• Ceramic Pens

Patents

• Coors Porcelain Co US3520630 Ballpoint assembly

Kyocera

• Kyocera US4597685 Nonoxide ceramic ball-point pen ball

This invention relates to a uniquely configured pen. 
The pen has an ink storage portion for holding the ink, a pipe-like pen point made of alumina 
and an ink guide core extending between the pen point and the ink storage portion.

• Kyocera US4653950 Nonoxide ceramic ball-point pen ball

This invention relates to a ball-point pen ball made of nonoxide ceramic and formed into a spherical body whose surface 
contains voids each having an average pore diameter of less than 75 μm and more than 0.1 μm. 
The ball thus made is not only almost free from "ball sunk", "nonuniformity in writing line thickness", "ball break", etc. 
but also excellent in affinity with ink and assures steady writing characteristic over a long period of time.

OHTO

• OHTO US5980765 Polishing composite ceramics comprising mullite containing alumina-silica and zirconia into mirror-finished balls; forming indentations on balls by chemical processing or physical processing
• OHTO EP 0823336 A1 Process for producing composite ceramic balls for ball-point pens

Using a newly developed composite ceramics material suited for balls of ball-point pens, a method of manufacturing composite ceramics balls 
for ball-point pens that have affinity for both oil-based ink and water-based ink is provided. 
In this method, the composite ceramics, whose main components are mullite (3Al2 O3 ·2SiO2) and zirconia (ZrO2) 
at the ratio of 50-95% to 5-50% by weight, is polished into mirror-finished balls and then chemical processing 
or physical processing is performed on the ball surfaces to form indentations in the ball surfaces. 
The chemical processing is preferably an etching using hydrofluoric acid, and the degree of indentations 
can be controlled by changing the concentration of hydrofluoric acid and the duration of etching.