I’ve got an unopened bottle of Levenger Cardinal Red and a just-barely-used bottle of Levenger Amethyst (a vivid Grapist-like purple) here beside me (50 ml each). I’ll trade for anything in the blue-green-brown family. I mostly use bottle fillers anymore, but I could accept Parker cartridges as well. Maybe even a cheapie pen if you can spare one…
Hmmmm. I’m afraid all my bottles of ink are not just opened, but used to quite an extent. On the other hand, I’ve several pens I don’t use anymore…but they are definitely cheap ones. As in, mass produced and sold on cards in general stores, not low-end Watermans.
I’m not really interested in an ink swap, but I’d certainly be interested in discussion and review of different inks, and even pens.
Stranger
I use Quink dark blue but I don’t suppose it differs markedly from whatever’s available elsewhere.