Catamaran is a turquoise blue with an average flow.
On Midori MD paper, there is shading, no sheen, no feathering and no bleedthrough.
This is written with a TWSBI ECO-T medium nib.
Below are a couple of photos of how it looks when it is written on both sides of the paper.
Disclaimer: This ink was purchased by me and all opinions/photos are my own. This post was not sponsored.