Staedtler Drafting Pen, Marsmatic Refill Ink, Black, 745 R-9

it make marks on paper.

A good choice for ink projects.

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

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

I got a Staedtler Mars Matic .50/2 and this ink has worked really well. When the pen sits for a bit, it does take a little effort to get the ink flowing again. The ink is really dark, smooth flowing and rather fast drying. It smudges a little if you touch it too soon, letting it thoroughly dry allowed handling without smearing.My only concern is trying this ink in a smaller nib, since on a 0.5 it takes a bit of tapping and scribbling to get the ink to flow again, I think it just might clog up the tip on anything smaller. I want to use up this tube of ink before considering experimenting on another nib. Will update if I decided to try these on the 0.35 I have.Only negatives I can think of so far is the expense and availability. at about $3.50 a tube it could become rather expensive if I made a habit of using this pen more often. I couldn't find too many sources for these which makes me think I'm not going to buy anymore and might just figure out how to refill these without making too much mess.

So much easier and cleaner than filling the pens from a Staedtler ink bottle (which is an alternative).

Good

Just as described works incredibly bleeds and soaks a little bit but not bad at all