It's my turn to host the Mix-Ability challenge this week, and I pulled out a technique I've been wanting to try for some time - painting with coffee!
You can work with regular or instant coffee - I chose instant coffee because it was easy to mix with a small amount of water, and easy to control the ratios for lighter and darker concentrations.
I filled a well of my palette about 1/2 full with the instant coffee powder, and then added water with a dropper until it was mixable. For a lighter color, I took some of the concentrated mixture and added more water in a second well.
Once the coffee is mixed, you can paint with it like you would a watercolor medium. Spritz with water to spread the color further or to create a wash for a background. Work from light to dark, and layer different shades of coffee paint to create depth.
The painted coffee also lifts very willingly with water, so I had some fun with lifting here too - splattering in the background then rolling a paper towel roll across the piece, and lifting the steam area to lighten it up.
This was a lot of fun, and I hope you'll try it - I used the cheapest, smallest container of instant coffee I could find, and I'm happy with the results. I was working on matboard here, but watercolor paper worked well too.