| 摘要 |
The invention relates to a writing instrument, in particular a roller ball pen, comprising a housing (7), with a reservoir (2) for ink (9) and a writing head (4), with a writing tip (5), whereby ink (9) from the reservoir (2) may be supplied to the writing tip (5) for drawing or writing. An information support (3) is arranged in the reservoir (2) in such a manner that the ink (9) provided in the reservoir (2) firstly covers the information on the information support (3) which becomes visible on gradual use of the ink (9). |
