Devil Black is a dark black ink named after the Tasmanian Devil that, until recently, was only found on the island of Tasmania. This ink has an average flow.
On Midori MD paper, there is no shading, hardly any noticeable sheen, no feathering and no bleedthrough.
This was 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.