Verdigris (unadulterated) and Zebra "G" nib on Original Crown Mill Pure Cotton paper
Old Holland Pthalo Blue, Green Shade acrylic color swatch (DickBlick)
Verdigris was one of my early favorites when I became interested in inks. I quickly got over it, though, when I realized just how unresistant to water it is. Still, it's an interesting ink and looks good diluted, too.
Care was taken to ensure color accuracy.