General term for ink used in pens, printing, stamps, etc. A common everyday loanword.
万年筆のインクが切れた。
The fountain pen ran out of ink.
このプリンターはインクの減りが早い。
This printer runs out of ink quickly.
The printer ran out of ink, so I bought a new cartridge.
I refilled the pen with ink.
The paper was thin, so the ink bled through.
Please write important documents in black ink.
magnetic ink