A technique that I’m asked about on a regular basis is how I get that watercolor effect with my ink drawings. First I start out with a regular ink drawing like the one below. If I know I’m going to use this technique I try and use inks that don’t dry waterproof, eternal or bulletproof.
The next step is to use a waterbrush to pick up ink and move it around on the page. It takes a little practice to get the “right” amount of water and ink to get the value/tone you want but after you get the feel of it, it’s effective.