Nemosine Neutrino Review

Fountain pens under $50. There is something about the $50 price point that is almost magical for people just getting into the fountain pen hobby. Almost all people who join the hobby look at a $50 price point and think, “I can never imagine spending more than that on a pen.” A few of them stay in that mindset. Many, myself included, start with that mindset and pretty quickly start upping that limit little by little; then before you know it, they’re eyeing $1,500 pens and somehow justifying the price…

But I digress. With $50 as the sort of universal upper limit for first-time pen users, people are always searching for pens they can try or recommend to others who are interested in the hobby. They want pens that don’t cost too much but that will be rock-solid writers. There’s nothing quite so disappointing as giving someone their first-time fountain pen only to have it be a dud and turn them off of the hobby forever.

It’s no secret that I’m not a huge fan of the two most recommended starter fountain pens, the Pilot Metropolitan and the Lamy Safari. Perhaps it is the contrarian streak in me, or my penchant for things that feel/appear luxurious. Neither of these pens is a bad pen, by any stretch of the imagination; and goodness knows they have legions of fans. But since they’re not quite the right fit for me, I’m always on the lookout for alternatives to these two pens that I can recommend without reservation. “Which starter pen should I buy” is perhaps the single most asked question I receive.

Earlier this season, I reviewed the Nemosine Singularity and liked it a lot. It has made its way up my ranking of top starter pens, and I consider it to be a great value. Nemosine also provided one of their newer pen models, the Neutrino, for review purposes. At a list price of only $30, the Neutrino fits firmly into the starter pen tier, and I wanted to see how it performed.

According to my surface-level reading, a neutrino is a minuscule sub-atomic particle that is generated from proton + proton reactions that occur in nuclear fusion. (Namely, the sun.) If you were to expand a single atom to the size of the solar system, a neutrino would be about the size of a walnut but comparison. With that in mind, the Nemosine Neutrino is aptly named–the Neutrino is a small pen. Funnily enough, while the pen is small, something about the pen’s design actually makes it look larger than it is. It’s not until you get the pen in your hand, or compare it to other models, that you realize how small it actually is.

The Neutrino is a metal-bodied pen that comes in five colors: red, gunmetal, jet black, navy, and nickel. It appears that the colors are lacquered on, and the quality of the lacquer is quite high and feels very durable. The pen is likely turned on a lathe rather than stamped or drawn, as the walls of the pen are on the thicker side and the pen has a slightly heavier quality than a pen like the Pilot Metropolitan.

The cap is topped with a rounded point finial which holds on the clip. The clip itself is flexible but still relatively sturdy. The rest of the cap is lacquered, but for a chromed cap band into which the name “Nemosine” is stamped.

When capped, the band on the cap lines up nicely with a matching chromed, grooved band on the barrel. With a casual glance, it looks as though both the cap band and the barrel bard are the same piece of metal. The rest of the barrel is lacquered, but otherwise unadorned, and comes to another rounded point.

The cap unscrews from the barrel with one and three-quarters turns. The barrel’s threads are the thicker, block-style threads. On the cap side, the cap is lined with a black plastic inner liner into which the threads are molded, so you avoid the metal-on-metal thread squeakiness. The threads on the barrel side are okay, but the chunkier block threads mean that, if you have to hold the pen higher up the barrel (more on this in a moment) you may end up with your grip directly on the threads, which aren’t painful, but not super-comfortable either.

Under the cap is a shiny, chromed section with a concave profile. This section is my only real disappointment with the pen, for a couple of reasons. First, I really dislike shiny metal sections. I have a personal tendency to death grip my pens, and I also tend to get sweaty hands when I concentrate, so sections like this get slippery and covered with fingerprints. Second, the section on this pen is very, very narrow. At its narrowest point, the section on the Neutrino measures 7.3mm. This is even narrower than the section on the minuscule Kaweco Lilliput. It’s far, far too small for me.

The section aside, in my hand, this pen is not quite the right fit. It’s too short for me to comfortably use unposted, but when posted, the balance feels off. The cap is almost the same weight as the body of the pen, and based on how it rests against the web of my hand, it feels a bit backheavy.

I am frustrated by the ill fit of this pen to my hand. Really frustrated. Because I freakin’ love the #5 medium nib on this pen. First, the design stamped on the face of the nib, an abstract butterfly-like pattern, is beautiful. While I tend to generally prefer gold nibs–especially soft gold nibs–I can both recognize and appreciate stiff steel nibs, so long as they’re well adjusted. This one is wonderful. It is a very unusual combination of slightly dry and ridiculously smooth. (This is up there as one of the smoothest steel nibs I’ve ever used–especially in this price range.)

It’s very difficult to get super smooth and slightly dry, while not over-polishing the nib into a baby’s bottom problem. Yet somehow, they managed to get this one just right. Now, normally, I prefer wetter nibs, but there are times when a slightly drier nib is the answer. I found this nib to be excellent on lower-quality paper, and never once to exhibit issues with ink starvation or hard starting. Even after sitting, nib up, inked and unused for a month, this pen started right up without having to prime the feed. It is a lot of fun to use.

As mentioned above, the Neutrino lists for around $30. However, on the Nemosine site, it retails for about $25. This puts it in the same price range as the Lamy Safari (except the Neutrino comes with a converter) and the TWSBI Eco. From a construction standpoint, the Neutrino is built as well as these options, if not better. From a nib standpoint, the Neutrino pretty much blows both of the others out of the water. The only real downsides for me are the diameter and material of the section.

The other nice thing about this pen is, like the Safari (and quite unlike the Eco), additional nibs can be purchased for the pen, allowing you to try out other nib gauges. With gauges of EF, F, M, B, and 1.1mm stub, this is a great way for new pen users to learn what they like and even to practice on adjusting fountain pen nibs with a nice way to undo any damage they do in the process.

Nemosine has done a nice job with this pen. Now if they could just drop the glossy metal sections (my kingdom for brushed steel!) and come up with a larger size, I’d be all over it.


Material: Metal
Nib: #5 Steel Medium
Appointments: Chrome
Filling System: Standard International Cartridge/Converter
Length (Capped): 136.3mm
Length (Uncapped): 116.0mm
Length (Posted): 147.5mm
Section Diameter: 8.5mm (7.3mm min)
Barrel Max Diameter: 12.0mm
Cap Max Diameter: 13.0mm
Weight, Uncapped (with ink and/or converter): 20g
Weight, Capped (with ink and/or converter):36g

This pen was provided free of charge for review purposes and giveaway by Nemosine. No other compensation was provided. All opinions expressed herein are my own.

  • Myroslava Luzina

    What about the cap unscrewing together with the section coming loose from the barrel? Some Nemosino models have this problem.

    • That’s not an issue with the design of this particular model. I think I only saw that on the Singularity.

  • FaithRobin

    Okay, Matt, I understand you are reviewing this pen the best you can with respect to your hand size. However, please remember, there are some of us delicate ladies out in the fountain pen world with smaller hands, who would enjoy a slimmer pen and a smaller section. Remember, you reviewed the larger Nemosine Fission back in April 2014 and overall you were fairly impressed with it. So, from my perspective, Nemosine already made a pen for the larger hand, the Fission, and has now come out with a more delicate pen for the smaller hand, the Neutrino. Please give this sweetie of a pen a fair shake on all the other merits it possesses and don’t knock it so much because of its stature. Being at the lower end of the five foot range for over six decades, I know what it’s like to be height-challenged!

    • I thought I did give it a fair shake…especially considering how much I praised the nib performance and construction quality and calling it every bit as good as the other entry-level pens on the market.

      That being said, I can only review pens through my own lens. Since I’ve never been a delicate lady before (at least not that I know of), I can’t review it on your behalf, only on my own.

  • FaithRobin

    Understandably, however, its smaller size came across repeatedly in the review, and as a negative aspect. My point is that it doesn’t have to be, since there are members of this community who may find a smaller, slimmer pen an asset. Fair enough?

    • I think I understand where you’re coming from. When it comes to reviews, though, I am of the school of reviewing that believes in reviewing items solely based upon my own personal opinions and experiences. Since the size of the section renders the pen largely unusable (for me) I feel as though I have to make that a major part of my review.

      Considering how wide-reaching the stationery lovers audience is, it’s basically impossible for me to consider the all the potential combinations of individual preferences in my reviews: (small vs. large pen, wide vs. narrow grips, metal sections vs. non-metal section, dry vs. wet, feedback vs. smooth, etc.) And simply stating the facts of the pen without applying an opinion to those facts makes it an overview rather than a review (IMO). The way I look at it, my “job” as a reviewer is to express my opinions, and if I’m a good reviewer, explain the _why_ of my opinions to the best of my ability. That way, readers/viewers can at least understand if the conclusions I’ve made would apply to their own set of preferences.

      In any case, thanks for the thoughtful conversation! I always like to hear from folks whose opinions differ from my own.

      • FaithRobin

        Thanks, Matt! You have made a strong case for more women reviewers in the fountain pen community. I do appreciate the thoroughness of your reviews and the write-up available, so one doesn’t have to search through the video again for a particular answer.

        Many of us are not only stationery lovers, but people with avocations or “retirement businesses” in the arts, either calligraphy or the making and/or selling of pens, etc., and we have a special fondness for fountain pens. Nothing glides across good paper quite like a fountain pen with a smooth nib.

        The best rollerball (IMO), can never duplicate a fountain pen. When I was teaching I used the Uni-ball Vision Elite rollerball pens, because they were the closest to the feel of a fountain pen I could get for grading papers. I used fountain pens for filling out passes and forms for students. Most of them thought fountain pens were very cool and I even got three students this last Fall, started on using fountain pens at their request! It is important to pass on this legacy so the mighty fountain pen doesn’t become obsolete!

        Sure would enjoy a pen show in the Southwest. Seems the closest I can find is Los Angeles. If the coordinators would ever consider the Phoenix/Tucson area that would be fantastic! My hubby and I are quite interested!

        Thanks for the chat. Enjoyed our conversation!

        • YES! Absolutely we need more women reviewers, especially in the video realm. And I’ve heard rumors of a possible Phoenix-area show potentially in the making, so hopefully something will happen along those lines. I’d love a nice winter-time show in the warm weather as an escape from the rain!

  • Lorie A. Victoria

    I’ve recently purchased this pen with an EF nib plus a separate 1.1 nib as I was under the impression they’re interchangeable! I pulled on the nib and feed as hard as I can without breaking it but it seems like it’s glued together. So disappointed and I don’t get the point why they’d sell separate nibs if they can’t be interchanged. I’ve searched online to check but zilch. I love the pen though and I’ve got several nemosines. Just bummed out about wasting money on an extra nib.

    • It should be interchangeable. I was able to pull my nib and feed out with no issue.

      There may be a manufacturing flaw with yours. Or it requires more force. But they are just friction-fit nibs, so they should pull right out.