Bottle and pricingA bottle of Rohrer & Klingner Verdigris holds 50ml / 1.7oz and retails for $12. That's $0.24 per milliliter, quite pricy.
Color and saturationI've barely started this review and I have already arrived at the crux of why I don't like this ink. It's not the only reason, but I dislike the color. While it's considered a blue ink, there's not a lot of blue in it, I'm afraid. It veers more towards green, but the greenish shade of copper oxide, which, in fact, is where the term "verdigris" comes from. Either way, my eyes just can't see any blue in this ink.
To compound the problem, under fluorescent light R & K Verdigris looks like a dirty, dull gray. I've been using it daily at work over the past couple of weeks, under such lighting, and that's how it is.
I've compared it to two of the only inks I've tested which bear a passing resemblance to it: Noodler's Bad Blue Heron and Noodler's Bad Belted Kingfisher. You can clearly tell which inks are blue and which isn't.
As far as saturation goes, it's pretty high.
ShadingTo be fair, Rohrer & Klingner Verdigris redeems itself just a little by showing some decent (but not outstanding) shading. It's best seen in the q-tip samples but also a bit in the writing samples, although the latter suffer from another problem which I'm going to mention shortly.
BleedthroughIt ghosts a little on cheap paper and the reverse side remains writable, though barely so.
Flow, lubrication, and smoothnessHere's the second (and perhaps biggest) reason why I dislike Rohrer & Klingner Verdigris. Just like it's brand-mate Fernambuk, Verdigris is a dry ink. It flows poorly in the Kaweco, and also inconsistently. You can see that in my writing samples. Some lines are thick and wet, others thin and dry. In my book that's a big no-no.
Drying timeThanks to its dryness, Rohrer & Klingner Verdigris dries very quickly, even on smooth Clairefontaine paper. Small comfort though.
Smearing when dryNone.
Water resistanceThis is not a water resistant ink. After 30 seconds under running water most of it has washed off.
ConclusionThere's nothing positive I can say about Rohrer & Klingner Verdigris. There must have been a reason that determined me to buy a sample but I can't think of it for the life of me. Perhaps it looked better in other samples I saw online. In person, the color doesn't appeal to me (though I'm sure plenty of folk will love it) and the dryness and inconsistent flow are deal-breakers. I'd say buy it - only if you dare.
Here are the two writing samples on photocopy and Clairefontaine 90g paper, respectively.