| 摘要 |
[Problem] To provide a writing instrument which can sustain stable writing performance over a long period of time and has good writing feeling and good hand writing. [Solution] A writing instrument provided with a pen point-holding member, a pen point attached to one end of the pen point-holding member, an ink tank attached to the other end of the pen point-holding member, and an ink for writing instruments that is contained in the ink tank. The ink comprises a compound capable of forming a lubricant interlayer. A carbonaceous film is formed on the surface of the ball and/or in a contact area of the ball holding section with the ball. |
