In this review I’m testing Van Dieman’s Styx Valley Forest Green, a green fountain pen ink, the same way I test everything on the channel: across multiple pens, nib sizes, and a stack of papers so you can see what it actually does before you buy it. I start with my general thoughts and then run writing samples on Maruman Mnemosyne, Clairfontaine, Portage Reporter, National Steno, Rhodia, Mead composition paper, and plain 20lb Hammermill copy paper. The goal is simple—show the ink in the real world, not just in a pretty swab. I also do two chromatographies (one “normal” and one after the ink has sat and dried for about 10 minutes) to see how it breaks apart and what’s hiding in the mix. Then I do my resistance testing on Rhodia after a full three-day dry time: highlighting, water, pen flush, and even a 1/3 bleach solution. I wrap up with nib/pen/paper recommendations for Forest Green, plus a color-complement suggestion (and in this one I point you to Robert Oster Tangerine as a great pairing) so you can build a set of inks that play nicely together.