Some delightful Talens gouache (pronounced goo-ahsh).
I bought a tube of black gouache from Straits Art Co. to test out with my dip nibs. Just mixed it with water at about a 1/3 ratio (I added water again and again so now I can’t remember how much I added in total) until I managed to get a nice wet black line out.
One issue with this is that it dries out quickly. So the remaining gouache in the bottle couldn’t be used anymore and I need to redilute it or prepare a new concoction. After a week I tried to redo it but couldn’t get the same consistency… 🙁