Barberry

Another entry from the botanical drawing class I took a couple years back. I honestly don't know how to describe the medium, because I've never seen it used before I took that class or since. Basically, my classmates and I were taught to use charcoal dust to paint on this translucent plastic(?) sheet -- the actual drawing on the front side and the shadow of the barberry sprig on the back side. It really does produce a scarily effective shadow effect, but I had a heck of a time not scratching up the surface of the plastic or acetate or whatever it was.