One of my favorite classes but most involved is Alcohol Ink Class. Typically, I only have one class a year because of all the materials it take to bring to class - well worth it though. Alcohol Inks are COSMIC. When applied to surface, the inks blend into each other without joining the other color. You just have to try it for yourself to see the magic.
Nine students and I dove into Alcohol Inks today - no, we didn't consume Alcohol. Alcohol Inks are very vivid paints that you apply to ceramics tiles, paper, and many other surfaces. I like to drip fall colors onto my pumpkins before I tangle them. Today we designed bookmarks on Yupo paper. It is a plastic paper that isn't porous. As you can see in the bookmarks below, the Alcohol Ink creates a "stain glass" feel on the surface.
Each student created three bookmarks. After letting the Alcohol Ink dry (which is super fast) we tangled a bit of Zentangle lines to enhance the colors. You don't want to take away from the color of the inks, so just highlights of lines create a nice foreground for the bookmarks.
Take a gander at these beautiful bookmarks.
Tada ... Aren't they beautiful.