After testing this ink with several technical pens of different sizes, I can say with confidence that it if you leave this ink in your pen, it will clog, even at a 2:1 water dilution. Not completely, it flows just fine at first and lays down beautiful ultra-black lines, but it's quite hard to clean. I've managed to clog my Faber Castell TGs over and over when leaving it in. I got fed up and just put Rotring ink instead.
If you must have black hole matter on your paper, I suggest using it for tech pens you're going to wash immediately after you're done drawing. For tech pens you're going to carry around with you, I suggest using Rotring technical pen ink, or Koh-I-Noor Ultradraw (which I've NEVER had any issues with, past its lack of saturation).
I've yet to try Matte Black, but I have the feeling it might give me less clogging issues.
After testing this ink with several technical pens of different sizes, I can say with confidence that it if you leave this ink in your pen, it will clog, even at a 2:1 water dilution. Not completely, it flows just fine at first and lays down beautiful ultra-black lines, but it's quite hard to clean. I've managed to clog my Faber Castell TGs over and over when leaving it in. I got fed up and just put Rotring ink instead.
If you must have black hole matter on your paper, I suggest using it for tech pens you're going to wash immediately after you're done drawing. For tech pens you're going to carry around with you, I suggest using Rotring technical pen ink, or Koh-I-Noor Ultradraw (which I've NEVER had any issues with, past its lack of saturation).
I've yet to try Matte Black, but I have the feeling it might give me less clogging issues.