I tried out some Noodler’s Heart of Darkness ink in a fountain pen they include with the bottle on a sort of zentangle-y cow sketch. I ordered it because I thought it was waterproof, or mostly waterproof, and was going to add color… but you can see what happened when I touched water to it. I’ll try letting some dry overnight and see if it still reacts the same way. I like the result, but I wanted a fountain pen I could use for my watercolor sketches. Oh well, back to Staedtler and uniball. They are great, so it’s all good. I just wanted to play around with line width a bit.