STAEDTLERMars Matic 745 R-9 Drawing Ink 22 ml Black

Belle qualité mais dispendieux

Found it, but thought it was expensive.

This is drafting pen ink. It's the same brand as my pens. What else do you need to know?

酷かもしれませんが、30年前のケースと形が異なるので、マルスマチックのケースに入らなかった。ケースは性能と関係ないので変更しなくてもいいのではないでしょうか。

This ink is fantastic very dark never clogs in your pen. I think it's waterproof I don't know. The only ink I will put in my pens