Found another ink that varies greatly by paper, Teranishi Guitar Gentle Green. It's blue when wet but dries to green on some papers. Green on Col-o-ring (not pictured), Rhodia, MD, and Endless. Blue on Iroful, Cosmo Air Snow, and Graphilo. I like both colors and the shading and sheen are nice.

Also tested Sailor Shikiori Kamo-shika on a few more papers. It's a good brown with shading on everything but Iroful. There, it's a purple leaning brown.

#ink #fountainpens @cae