Ink: Rohrer & Klingner Cassia
A vibrant purple. I like the way it shades. The ink seems well-behaved; it doesn't take overly long to dry, and it flowed well in the pens I tried it in. Seems like a great everyday purple with some flair.
Shading: Yes, with bigger nibs on most paper. On Tomoe River paper, I saw some shading even with an EF nib. The color ranged from a medium purple to a dark, eggplanty purple.
Sheen: I didn't see any with normal writing, but there was a slight sheen in the drawing where I layered lines.
Water Resistance: It is not water-resistant.
Ease of Cleaning: Fairly easy. It took a few flushes for the water to run clear. It seems pretty saturated. While cleaning, I got some light ink stains on my hands, but they washed off with a little rubbing.
Nib Creep: None seen after about a week in the pens.
Tomoe River Paper:
Dry Time: Fine nib; less than 15 sec.
Water Resistance: Legible after one swipe with a damp water brush, but completely washed out by a wet brush.
Writing Samples: Shading with the B nib, some with the F, and even a tiny bit with the EF. No feathering or bleedthrough, and moderate showthrough.
(This notebook is not particularly fountain pen friendly. The paper feels rougher than the previous two notebooks I had, and ink seems to feather more easily.)