I've really started to love purple inks. I think they are great for fall, as they're basically the honorary Halloween color. I really enjoy Robert Oster inks so far, so let's take a look at Robert Oster Berry d'Arche. This ink is exclusive to Vanness Pens.
Berry d'Arche is a dark purple with shading.
This ink doesn't sheen. It does, however, switch colors when pooled. If you lay a lot of ink down, it looks black instead of purple, which is cool, it's just not sheen.
Dry time: 22 seconds
Water resistance: Low
Show through: Medium
I started off with a Pilot 912 FA and then switched to a broad Vanishing Point. I didn't have any real flow issues, just a little bit of railroading (but I think that's mostly the pen's fault).
Overall, I really like this ink. I love that it has some good shading, and that it looks black when used in a very wet nib. At this point, I've reviewed enough Robert Oster inks to say that you really can't go wrong with any of his inks.
Disclaimer: I purchased this ink myself, and all photos and opinions are my own. There are no affiliate links on this page.