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Ask TGS: Back to Basics on Filling Systems, and Nib Size Variability

March 8, 2025

So we’re back with another Q&A session, this time focusing on two particularly “urgent” questions. Here, I would say that they’re “urgent” in the sense that I’m seeing these same questions (or some slight variation on them) come up repeatedly, which to me indicates that manufacturers, retailers, and other pen industry stakeholders aren’t doing a good enough job of educating newcomers to the fountain pen space. To that end, I’m going to keep publishing these posts and consolidating/organizing them in the “Ask TGS” space for future reference.

Question 1: Why Does My TWSBI Vac700 Or Nahvalur Original Plus or Pilot Custom 823 Only Write for a Half a Page and Then “Dry Up”?

I’ve received this question from three different people in the past month, all of whom purchased one of these vacuum-filler fountain pens without realizing how the vacuum-filling system worked. All of these pens feature a “shut off valve”, which is basically a stopper that seals the ink in the barrel, cutting it off from the nib and feed, when the blind cap is screwed all the way down. On the one hand, this is great for travel, because it means that you can typically bring these pens on an airplane without having to worry about ink leaking into the cap due to changes in temperature or air pressure. On the other hand, in order to write for more than a half-page or so, you will need to open the valve by unscrewing the blind cap one or two turns to allow the ink to flow consistently. It’s a feature of this filling system, not a design flaw, and is quite likely the best way to travel with a fountain pen if your goal is to absolutely minimize the possibility of leakage. See the photo below for an illustration of what I’m talking about.

Here, I’ve opened the blind cap on my Pilot Custom 823 as I would for a longer writing session.

Question 2: My Aurora 14K Fine Nib Writes Wider Than The JoWo Stainless Steel Medium on My diplomat. Is The aurora Nib Defective?

I’ll start by answering this question as directly as I can: No, not necessarily. However, this response needs a lot of context.

Those new to fountain pens often don’t realize that nib sizes are not uniform across brands, and many factors can determine how wide a line any specific nib will leave on the page. For example, a fine nib from a Japanese brand will generally write a much narrower line than a fine nib made by a German company like JoWo or Bock. While regional variations in average handwriting size and general preferences for finer lines in certain countries explains some of the variation between manufacturers, it’s not the entire story, and there are several things to keep in mind when setting expectations:

  • As a general matter, there is little uniformity in the fountain pen world. Fountain pens are inherently imprecise instruments. While ballpoints, gel pens, and rollerballs have less variability with their well-known .5mm, .7mm, and 1.0mm tip sizes, there is no standard for what constitutes an “extra-fine,” “fine,” “medium,” or “broad” fountain pen nib. For those brands that make their nibs in-house with a lot of hand-finishing (like the Aurora referenced above), there may even be variability between individual nibs that are technically the same size.

  • Gold nibs generally write a wetter, wider line than steel nibs of an equivalent size. While not always the case, this is a reasonable expectation. Gold nibs are typically “softer” than steel nibs, meaning the tines have more give and they will accordingly release more ink on the page. On average, the gold medium nibs in my collection write a wider line than their steel counterparts.

  • A fountain pen with an ebonite (hard rubber) feed will generally have heavier ink flow, and hence, write a wider line, than a pen with a plastic feed. This is why makers often pair flex nibs with an ebonite feed, because the ebonite feed ensures that the ink flow keeps up with the nib. Softer gold nibs paired with ebonite feeds can be extremely wet writers, to the point where I personally default to the “extra-fine” nibs in certain brands like Scribo.

  • Piston Fillers, Vacuum Fillers, and Eyedroppers generally write a wetter line than cartridge-converter pens. Again, this is a generalization, but I’ve always found that pens with a larger volume of ink in direct contact with the back of the feed are by default wetter writers, which can affect line width.

  • Your choice of ink and/or paper will affect how a nib performs. Certain inks are wetter than others, and can spread more on the paper. If you have a pen that you feel consistently writes too wide a line, you can try to switch the ink up to something drier, like an iron gall ink and many blue-blacks. Relatedly, non-coated papers that are more absorbent will show a wider line because the ink has a tendency to spread as it soaks into the paper fibers.

To illustrate how these factors combine to affect how a specific pen behaves, consider the question about the Aurora pen above. While a 14k gold Aurora fine nib is on the stiffer side for a gold nib, paired with an ebonite feed in a piston filler, it would not surprise me to have the pen write a similar line to a stainless steel medium JoWo nib (and maybe even wider with a particularly wet ink). To illustrate, here’s a writing sample from my own 14k Aurora Sigaro Blu compared against a writing sample from a stainless steel Kaweco Sport.

There’s not much difference here. The particular Kaweco nib I chose was the wettest one that I could find in my collection, and even then it’s only slightly wider than what I would consider to be a moderately dry Aurora 88 fine nib, which is a 14k nib on a piston filler with an ebonite feed.

So what’s an aspiring fountain pen user to do here? Experiment. That’s part of the fun with fountain pens, and to the extent you can, get to a pen club/pen store/pen show and try as many different pens as possible to get a feel for how different nibs write. While comparing writing samples online can be helpful, and give you a general “ballpark” idea of how a nib will behave, it is at best an approximation because that writing sample is limited to a single combination of pen, ink, and paper that was used to write the sample. Over time, most fountain pen enthusiasts develop preferences for certain brands based on experience and how certain nibs work with our handwriting. Many of us take our pens to a nib grinder to have them tweak the nibs even further to modify ink flow and to shape tipping in order to get the line variation that we want. That’s the great thing about fountain pens - they are infinitely customizable, and you can tweak many different variables to get exactly the writing experience you desire.

We’re open this weekend in-store! Come see us from 9-6pm on Saturday and 1-5pm on Sunday. We have plenty of pens inked up for you to test, so you can see exactly what I’m talking about above.

In Ask TGS Tags Ask TGS, Nib Grinding, Nibs
2 Comments

Four No. 8 fountain pen nibs, from left: Jinhao x159; Conid Bulkfiller Kingsize; Montegrappa Extra 1930; Montblanc 149.

"Serious Nibbage": Do No. 8 Nibs Live Up to the Hype?

January 28, 2023

Every year, there are a couple of products that see their popularity soar unexpectedly, despite the fact that the’ve been around for a while. In 2022 - and continuing into 2023 - one of those product categories is the No. 8 fountain pen nib. For those unfamiliar with fountain pen nib sizing schemes, the size of the nib itself (as opposed to the tipping) is denoted by number. Different regions (or even brands) will use their own numbering so there is little overall consistency, but for purposes of this article, the generally accepted “standard” nib size is a No. 6 (i.e., your typical JoWo or Bock nib), with the larger No. 8 rapidly growing in both popularity and availability.

If what you’re looking for is a bouncy, wet writer, a Bock No. 8 titanium nib, like the one on the Kingsize Bulkfiller, will serve you well. You also don’t need to pay Conid prices to get one. They are available separately from many different sources and can be fitted to pens like the Schon Ultem, provided you have the appropriate section. More on that below.

Why Do People Like No. 8 Nibs So Much?

A No. 8 nib just looks different. Part of the appeal is the uniqueness factor. The experience of writing with a nibbed pen adds much of the charm to using a fountain pen in general, and the larger No. 8 nib is especially eye-catching. The first time you see a pen like the Montblanc 149 or the Pelikan M1000, what you notice is that giant gold nib. Other companies, like Conid, offer gold but increasingly the standard No. 8 nib for small-batch and custom makers seems to be the less expensive No. 8 Bock titanium nib, with a matte finish that pops in its own way.

A smoother writing experience. Many people who first recommended No. 8 nibs to me commented on how much smoother they feel, and to a certain extent they’re correct. I suspect that the “smoother” feel comes from the larger feed, which if tuned properly will deliver more ink, which in turn makes the nib write “wetter,” and a wet nib typically feels smoother than a dry one because it masks any rough spots on the tipping or tine misalignment. If you like wet nibs with a bouncier feel, you will probably enjoy Bock No. 8 titanium nibs, which deliver a lot of ink and provide some line variation.

More stability and control. Personally, I appreciate No. 8 nibs for the same reason that larger pens are growing on me: a greater degree of stability and control over my writing. The larger nib feels more precise in your hand, especially with a finer nib like the one on the Jinhao X159 discussed below.

The pen on the left costs $1100. The pen on the right costs $12.50. As you can see, you don’t need to break the bank for the No. 8 writing experience.

Less Expensive No. 8 Nib Options Are Becoming More Widely Available

Currently, I have four No. 8 nibs in my collection: A Montblanc 149 with a broad nib (that writes more like a stub); a Montegrappa Extra 1930 with a medium nib; a Conid Kingsize Bulkfiller with a medium titanium nib (review forthcoming); and a Jinhao X159 that just arrived the other day. Of these four, the one that surprised me the most was the Jinhao. I love it when I discover extremely inexpensive pens that are fabulous writers, and while this stiff nail of a steel nib won’t give you the same wet writing experience or bouncy feel as the others discussed, for $12 I’m not sure you’re going to care. Because these larger Jinhao nib units are threaded and unscrew from the pen, I’ve heard that penmakers are starting to experiment with Jinhao-compatible sections, which will allow you to use these nibs in custom pens. Another less expensive option are the Magna Carta stainless steel nibs, which I’ve heard are compatible with the No. 8 sections made for the Schon DSGN Ultem pens. (UPDATE: See comments below, as people have had mixed success with Magna Carta. What I’ve heard is that the recent batch works with the Ultem pens, but YMMV.)

Jinhao-X159-Writing-Sample

The Jinhao X159 writes a smooth, dark line. The writing experience offered by this pen punches FAR above its price point. The body of the pen does feel pretty inexpensive - even cheap (which it is), but the nib is superb.

Stay tuned for more No. 8 nib-specific content, specifically how these options all compare to one another. I’m planning on picking up some No. 8 sections for my Schon pens during this year’s pen show adventures, and I’m also looking forward to trying out the JoWo No. 8 nib, featured on the Edison Collier Grande.

Enjoy reading The Gentleman Stationer? We are supported entirely by purchases from the T.G.S. Curated Shop and pledges via the T.G.S. Patreon program. This post does not include paid advertising or third-party affiliate links.

In Editorial Tags Nibs, No. 8 Nib, Fountain Pens, Serious Nibbage
6 Comments

* This is not a scientific poll, and is intended for entertainment purposes only. Statisticians please don’t come at me.

What's the Most Popular Nib Size? By a Wide Margin, It's Fine or Medium.

January 25, 2023

Sorry broad-nib lovers, but the numbers don’t lie.* You may have noticed that I’ve been doing some surveys lately, both via Patreon and via Instagram, and it’s for several reasons. First of all, I’m always curious about people’s preferences and what they use for their everyday writing. Second, I’ve noticed that as many as 65% of the pens I sell are fines and mediums. If that holds as true, my buying strategy of stocking up on equal numbers of all nib sizes probably isn’t the best idea, especially as I bring in more pen lines and invest in more expensive inventory. So I posed the question: If you’re purchasing a pen to use unmodified, in one of the “default” nib sizes of extra-fine, fine, medium, broad, or stub, what size do you prefer?

Here are the results (which as of the time of writing are still preliminary on Instagram, but overall consistent with data I’ve seen elsewhere so I have no problems going ahead and posting my conclusions):

  • On T.G.S. Patreon, 75% of respondents chose fine or medium. The other 25% chose broad, stub, or wider (if available). Surprisingly, nobody chose extra-fine.

  • On Instagram, as of the time of writing, 63% chose fine or medium. 16% chose broad or wider, and 21% chose extra-fine. The Instagram results are probably more reflective of the community at large, as it’s a bigger sample size.

More mediums and more fines. Based on a survey of my own collection and what nibs I currently have in most of my pens, I seem to be pretty “average” in terms of what I use on an everyday basis.

As I noted above, anyone with rudimentary training in statistics could find multiple ways to criticize this poll, and it’s neither intended to be scientific nor taken completely seriously. When I posed the question, I also framed it around “stock” nibs that are generally universal across brands, as there’s a lot of variation between different companies’ in-house nibs. But let me say this: the results of this poll are 100% consistent with what I see going out the door in my shop, so at a minimum the responses are a pretty accurate reflection of the nib preferences of The Gentleman Stationer readership. One of the fun parts of being a retailer is having a bit of insight into what people actually buy, as opposed to what gets the attention on blogs, social media, and podcasts. If you follow pen-related social media at all, you might be forgiven for thinking that most true fountain pen enthusiasts write only with broad nibs or stubs - nibs that lay as much ink as possible on the page - or microscopically small needlepoints. While many people certainly enjoy having a few unusual nibs in their collection, those of us who are forced to go out into the word and write on what passes for “office paper” these days recognize that’s not a sustainable approach to modern life.

For me, it’s medium nibs all around, and I have never had any issues having a medium nib ground into a cursive italic or stub (like the Franklin-Christoph medium S.I.G. nib on the left).

Personally, I default to purchasing pens with medium nibs. A medium is broad enough to show off ink without soaking a page of copy paper, and usually still has enough tipping to support a nib grind. That said, I have so many medium nibs in my collection - including handfuls of loose JoWo and Bock nib units - that I’ve recently taken to purchasing broad or double-broad nibs solely for the purpose of accumulating a ready stock of nibs for modification. Nahvalur nibs in particular have a LOT of tipping, so if you’re purchasing a pen with the specific intention of getting a specialty nib grind, keep that in mind. In San Francisco, I had C.Y. of Tokyo Station Pens modify my Double-Broad Nahvalur Nautilus into a Naginata-style grind, with an excellent result.

I’m still interested in hearing directly from readers: What factors do you consider when selecting a nib? Why do you prefer one nib size over another? Please feel free to leave a comment or send me an e-mail!

Disclaimer: The Gentleman Stationer is supported entirely by purchases from the T.G.S. Curated Shop and pledges via the T.G.S. Patreon Program. This post does not contain paid advertisements or third-party affiliate links.

In Editorial Tags Editorial, Poll, Survey, Nibs
2 Comments
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