Monteverde Sapphire is a vibrant blue. It shades beautifully and has a wet flow. There is the tiniest bit of sheen in the darker areas where the ink had pooled, it is not obvious unless you are looking really hard. There is a tiny bit of bleedthrough on Rhodia paper.
This is written with a TWSBI ECO-T medium nib.
Disclaimer: This ink was purchased by me and all opinions/photos are my own. This post was not sponsored.