A Trio of 2025 Chicago Pen Show Inks

(Kimberly (she/her) took the express train down the fountain pen/stationery rabbit hole and doesn't want to be rescued. She can be found on Instagram @allthehobbies because there really are many, many hobbies!.)

One of my favorite things to get at a concert, show, event, or shop, is something that reminds me of the occasion, whether it’s a t-shirt, bag, or sticker that makes me remember that event. In the case of pen shows, it’s no surprise that I am a sucker for show-exclusive inks!

At the 2025 Chicago Pen Show, I bought several bottles of ink, but 3 of them were specifically made for this show! The first one is the official show ink, Windy City Blue, made by Colorverse to celebrate the show’s 45th anniversary. The second one is Papier Plume Lake Michigan Springtime. And last, but not least, is Anderillium’s Chicago River Green.

Note: I add swatches to similar color family inks in both the Hobonichi Weeks and 68 gsm Tomoe River notebook. Unlike the Col-O-Ring swatch card comparisons, the Weeks and TR swatches might not be that close to the ink in question.

L to R: Colorverse Chicago Pen Show 45th Anniversary Windy City Blue, Papier Plume Lake Michigan Springtime, Anderillium Chicago River Green.

Despite the box and bottle’s lighter blue color, the Windy City Blue is more of a darker blue-leaning teal.

You can see a hint of red/purple sheen in wetter parts of the swatch and writing sample.

Swatch/writing sample of Windy City Blue on 2022 Hobonichi Weeks, which has slightly cream-colored paper, along with Anderillium Indigo Bunting Blue, Montblanc Leo Tolstoy, Montblanc StarWalker Blue Planet.

Swatch/writing sample on 68 gsm Tomoe River Endless Recorder notebook. Accidentally added an “s” to the ink name, oops.

Inks similar to Windy City Blue: Rohrer & Klingner Verdigris, Robert Oster Lake of Fire is the closest match, Van Dieman’s Hanging Lake, New Brew Space, and Robert Oster Great Southern Ocean are also close but a touch too blue.

I’m eager to put Windy City Blue in either the Sailor x Cult Pens Pro Gear Slim, Midnight Sky Blue or the Leonardo x Figboot on Pens Momento Zero, Carolina Midnight.

I love that Papier Plume dips their ink bottle caps in wax and then stamps the top.

My swatches of Papier Plume Lake Michigan Springtime look fairly green but I’ve seen some swatches where it has more teal to it. I double checked with some friends who agreed that theirs is also more green in real person but looks a bit more teal in photos.

First/only swatch/writing sample of Lake Michigan Springtime in the Hobonichi Weeks. This looks more teal than on the Col-O-Ring cards.

A green leaning teal on TR 68, but still fairly green.

Inks similar to Lake Michigan Springtime: Waterman Harmonious Green, Jacques Herbin Vert Metropolitain, Wearingeul Tick Tock Croc, Diamine Velvet Emerald, Iroshizuku Sui-gyoku (this and the Diamine are a touch too blue), Diplomat Deep Green (a bit too dark.)

The Kaweco x GoldSpot Pens Sport, Transparent Turquoise (which is way more of a teal than turquoise), and the greenish parts of the Aurora Optima, Azzurra are both good matches for Lake Michigan Springtime.

Anderillium Chicago River Green is a pleasantly bright, spring green ink.

Chicago River Green in the Hobonichi Weeks along with Pennonia x Inkdependence Hens & Chicks and Anderillium Green Kingfisher Green.

Inks similar to Chicago River Green: Diamine Appletini (too yellow), Papier Plume 2019 SF Pen Show Marina Green, Robert Oster Envy (both of which are close but still too yellow), Organics Studio Frog Green Shimmer, Diamine Merry & Bright (the closest), Van Dieman’s Wasabi (second closest.)

Anderillium Chicago River Green would look great in the Taccia Spotlight Forest Eye or the Kaweco x Cult Pens Apple Green.

Even though I can find similarly colored matches for all 3 inks, I still love having them as souvenirs of this year’s Chicago Pen Show. The inks cost $15-20 per bottle and are a great way to remember a fun pen show. If you didn’t get a chance to snag them, you can reach out to Roger Wooten, (show organizer) to see if they are willing to sell/ship the Colorverse ink. You can order Anderillium Chicago River Green from Atlas Stationers. Papier Plume is currently sold out of Lake Michigan Springtime but you can add it to your wishlist in case they decide to make more.

(Disclaimer: All 3 inks were purchased by me at the show at regular price.)

Robert Oster Jade Ink Review

(Jeff Abbott is a regular contributor at The Pen Addict. You can find more from Jeff online at Draft Evolution and Twitter.)

Spring is finally making its way to the northern hemisphere, and I've found myself compulsively choosing green whenever it's available. There's something about the cheery green shade that really appeals to me at the moment, and I've decided to lean into it. This applies to all things in my sphere, not just stationery. For my 2025, whenever I buy something new (and assuming the option is there), I'm choosing green. That being said, fountain pen inks are a great place to dive in, because there are so many beautiful green inks out there.

This week, I'm looking at Robert Oster Jade — a lovely medium green with moderate shading and great performance. In terms of the namesake, I think it does a good job of matching the gemstone, though it makes me think of green leaves or blades of grass more often. To me, it seems like a great middle-of-the-range green hue, and the shading elevates from a basic green to something more.

The range of color that the ink exhibits isn't huge, but there's just enough differentiation that is easy to see when used with any nib. The range of greens in this ink is what makes it so life-like and dynamic on the page. Just like leaves, blades of grass, and mineral formations, there's a wide variation of color on the surface that can shift and change with the available light. The shading is what makes this ink so enjoyable to use. Jade is a simple ink that works exceptionally well.

Writing with the ink is on par with any other Robert Oster ink I've used. There's no bleeding or feathering, and the ink starts quickly and without any drama. The flow is good and it provides plenty of lubrication to the nib so that nibs feel smooth when they move across the page.

One thing that the ink doesn't do well is dry quickly. In most cases, the ink takes roughly 25-40 seconds to become fully smudge-proof. It's mostly dry after 20-30 seconds except for the areas where ink naturally pools where the nib changes direction and deposits a little extra ink. This isn't a terrible time for drying, but it won't suit anyone who needs a fast-drying ink.

When it comes to price, Jade is right in line with the rest of the standard Robert Oster lineup. A 50 ml bottle is $19, while a small 4 ml sample vial will set you back $3.75. For me, the bottle is a no-brainer because I know I'll use this ink a lot.

Within a few minutes of testing it out, I already knew that it was in my top tier of ink colors, and the great performance seals the deal. The world is a scary, dark place, and it helps to choose brightness where we can. For me, this ink helps transport me to a happier place when I need a little pick-me-up!

(Vanness Pens provided this product at a discount to The Pen Addict for review purposes.)

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Colorverse Maryland Blue Crab Ink Review

Let’s be clear about something: I’m easily enabled. There are tiers of enabling, though. For example, “Hey Brad, LAMY has a new release, have you seen it?” Whether I answer that question with a yes or a no, I’m already on my way to buy whatever it is to get a look at it.

A much lower tier would be something like Blue ink. I have a Blue ink infestation on my ink shelf as it stands right now, with many shades represented. So when someone says, “Hey Brad, you should check out Colorverse Maryland Blue Crab, it’s an interesting Blue ink,” I have no business even considering adding yet another Blue to the collection.

But we wouldn’t be here now if I didn’t buy it, would we?

Once I looked at the swatch of Blue Crab, I did think it looked interesting, so I added it to my cart. Once it arrived and I inked it up, it looked better than I expected on the page. The best part about it is that I can’t exactly explain why.

Blue Crab was created by Colorverse to represent Maryland, as part of their USA 50 States series. These large sets are always fun to play around with, seeing what they come up with to represent - in this case - States. And Blue Crab for Maryland? How perfect is that. What did you think they would choose, Natty Boh?

The description of this ink is listed as “pale sky blue ink with medium shading,” and while I agree with the shading description (which I love, btw,) I’m not sure I would call the color pale. Dusty maybe? Is there a difference between pale and dusty even? I’m not sure, but my point with Blue Crab, and the challenge I’m having, is how to describe it.

There are many ink descriptors we like to use - bright, saturated, light, dark, moody, etc. - and I’ve yet to be able to nail down this one. It’s weird and normal, odd and fun. It makes me like it more that I can’t define it specifically.

I used a prototype Esterbrook (sorry!) with a Journaler nib grind with Blue Crab, and I love the pairing. My letters look so good, mainly because of the shading the ink has. The grind, similar to a Stub nib, helps pull and pool the ink within my letters, from top to bottom, giving them that cool two-tone look we call shading. It’s my favorite aspect of this ink, and has me wanting to write more and more with it.

There are no performance or color downsides to Colorverse Blue Crab, but the bottle leaves a lot to be desired. I don’t mind 15 ml ink bottles, but the opening is so small that you are only getting a converter or syringe inside of it to fill your pen. I can deal with that, but if you aren’t prepared, that could be annoying. Also, at $13.50, it’s not exactly cheap per milliliter. There are many better values on the market.

In the case of Colorverse Maryland Blue Crab, I wasn’t going for value. I was going for CRABS! And I got them, in the form of a color I look forward to using frequently. Nicely done.

(Vanness Pens provided this product at a discount to The Pen Addict for review purposes.)

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Enjoy reading The Pen Addict? Then consider becoming a member to receive additional weekly content, giveaways, and discounts in The Pen Addict shop. Plus, you support me and the site directly, for which I am very grateful.

Membership starts at just $5/month, with a discounted annual option available. To find out more about membership click here and join us!