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 some bleedthrough on Leuchtturm1917 paper.
I managed to get a LEUCHTTURM1917 planner for a cheap price at the end of the year when shops are clearing the unsold 2020 planners. It used the same 80gsm paper found in LEUCHTTURM1917 notebooks so I decided to use it for writing samples.
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.