I just got a Pelikan 2xx anthracite demonstrator from the Marketplace forum, and I don't want to foul it up by using an ink that stands a substantial chance of staining the pen. If necessary, I'm willing to buy a new ink. I'm sure there are plenty of threads that will help me out in that regard. Before I take that step, I thought it better to get some feedback about the three inks I own that I imagine are the safest options. They are:
Quink Blue-Black
Skrip Black (Slovenian)
Waterman Black
All three ink brands have a reputation for being well behaved. Which one (if any) would you put in your demonstrator?