Oil and water, apparently not just for salad dressing.
And then I made six more... for reasons.
Experimenting with some quick and dirty paper marbling methods for work. Normally you would blend methylcellulose and water into this really gloopy mix, drop inks into that, and then rinse the excess gloop and ink off of prepared paper, but I wanted to cut down on the number of steps.
The oil and food coloring method was definitely too oily, but on my second attempt, I tried thinning out oil paints with gamsol, and that worked pretty well.
Some of the links I used to start with:
http://billnye.com/billnye_resource/marvelous-marbling/