Comparing Low Viscosity Ballpoint Pens: Jetstream vs. Acroball vs. Anterique vs. Ohto

It’s been interesting to see pen manufacturers - especially the Japanese manufacturers - move away from standard ballpoints to low viscosity refills. You sometimes hear these refills referred to as “hybrid gel-ballpoint”, because they combine the permanence and quick dry times of a classic ballpoint pen with the smoothness of a gel pen. Personally, I love them, and they form a core part of my own everyday writing rotation. The downside is that outside the Jetstream line, you don’t have many color options, with most companies offering these refills only in black.

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In order of darkness, I would rank the inks as follows: Pilot Acro Ink, Uni Jetstream, Anterique Mach Ball, and Ohto. In order of dry time, I would rank them the exact inverse: Ohto, Anterique Mach Ball, Uni Jetstream, and Pilot Acro Ink. That’s not to say that any of them “dry slowly,” but with a darker like, you will get more smoothness, and with that added smoothness comes increased dry time because it means more ink is on the page.

With so many of these sorts of pens entering the market, I thought it might be helpful to do a quick comparison of my thoughts on four of the most common brands: Pilot (Acro-Ink / Acroball), Uni (Jetstream), Ohto (various needle-tip refills), and Anterique (“Mach-ball”). See below for my thoughts on each. Please note that this post is not intended to be comprehensive, but rather an overview of the more popular refills that I often get asked about, with a focus on how they compare to one another. For a more general overview of low-viscosity ballpoints, including other brands, see this post here.

• Uni Jetstream. Probably the easiest to find of all the refills featured in this post, the Jetstream comes in anything from D1 size to Uni’s own proprietary multi-pen size to a standard Parker-style cartridge. The biggest selling point of the Jetstream is the number of options you have. D1 and multi pen refills come in colors that include black, blue, red, and green, and even though the Parker-style cartridges are available only in black, you still have .38mm, .5mm, and .7mm tip sizes. Jetstreams are smooth writers - maybe not quite as smooth as Pilot’s Acro-ink, but you’d have to be a pretty big ballpoint aficionado to notice the difference.

• Pilot Acro-Ink. In my opinion, the smoothest, easiest-writing refill on this list. While Pilot’s Acro-Ink refills aren’t quite as ubiquitous as the Jetstream line, I like them for longer-form writing. The .7mm writes a smooth line without smearing, and in my opinion it’s a better .7mm tip size than the Jetstream. These refills are found in the Pilot S20 ballpoints, the “Dr. Grip” line, and the Pilot “Acroball” pens that you can sometimes find in larger office supply stores.

• Anterique “Mach Ball” Refill. Anterique is known for taking the classic vintage-style click pen and upgrading it with their excellent refill. It only comes in one tip size (.5mm), with black ink, but it’s a great pen and relatively inexpensive. Pro tip: you can often substitute one of these refills into a standard vintage Bic Clic ballpoint. I have a large collection of vintage ballpoint pens, and it’s been a joy to give many of them a fresh life with a new refill. Sometimes you have to trim or extend the Anterique refill, as I don’t think the specs on the Clic were consistent over the years, but there are only a couple of exceptions where I was unable to make it work. Anterique’s biggest selling point is that it dries nearly instantaneously.

• Ohto Needle-Tip Ballpoint Refill. The ultra-precise .5mm needle-tip ballpoint has become Ohto’s hallmark. Of all the pens on this page, Ohto’s are on the drier side, but what this means is that you will get a very precise line and zero smearing. Ohto makes the refill for Object Index, Traveler’s Company, and Mark’style branded pens. Honestly, if you see any Japanese needle-tip ballpoint pen, chances are it’s an Ohto.

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Writing sample pens are, from left, the Pilot S20 (shown here in brown), the Anterique Mach Ball Standard Size, the Object Index Cedar Pen, and the Uni Jetstream 4+1 Bamboo.

I’m a huge fan of ballpoints and they play a huge role in my everyday working life because, well, they just work. We stock a wide variety in our shop, and if you come visit us in person, ask to try each of the refills featured here, as we have testers generally available.

Thank you for reading! The Gentleman Stationer is supported by the T.G.S. Curated Shop and the T.G.S. Patreon Program. If you’d like to visit our in-person location, you can view directions and up-to-date hours here.

Refill Hacks: Alternatives for the Caran d'Ache 849 Ballpoint

While I personally think the Caran d’Ache 849 “Goliath” refill that ships with every Caran d’Ache 849 ballpoint pen is a smooth, reliable, relatively dark refill that lasts a long time and, at the end of the day, gets the job done just fine, I understand that many of you are left wanting a different option for Caran d’Ache’s iconic click pen. The Goliath, however, is a proprietary refill with a slightly odd shape that makes it tricky to replace. Over the past few weeks, I’ve experimented and come away with three alternatives that work reasonably well.

Note: The hacks discussed below are just that, “hacks,” and not in any way a modification authorized by the manufacturer. While I’d personally consider the risk extremely low - especially with a ballpoint - if you break any pen by modifying the mechanism or using a non-standard refill, you will likely void your warranty. The same goes for modifying or grinding fountain pen nibs, feeds, etc. Proceed at your own risk!

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The Caran d’Ache 849 Rollerball Refill appears to fit most of the 849 ballpoint pens just fine, though if you get a refill that’s slightly too long, you can adjust using Option 2 below.

Option 1: The Caran d’Ache 849 Rollerball Refill

Many people were thrilled to see Caran d’Ache release a larger rollerball pen in the classic 849 profile. The best part about it? The 849 Rollerball uses a Parker-style rollerball refill - and a really good one at that - which comes in both .5mm and .7mm sizes, in black or blue ink. (The 849 Rollerball pen itself ships with a .7mm black rollerball cartridge.) While you can turn the 849 Rollerball into a larger ballpoint using any Parker-style refill, I’ve had very good luck with the inverse - the Caran d’Ache Parker-style rollerball cartridge also appears to fit the standard 849 ballpoint pen without much, if any, modification.

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Parker-Style refills such as the Jetstream SXR (in the yellow pen) and the Schmidt P900 (pictured here) can be made to work with a simple trick.

Option 2: The Jetstream SXR (and Most Other Parker-Style Ballpoint Refills)

One of my favorite ballpoint refills of all-time is the Uniball Jetstream SXR - a Parker-style low viscosity ballpoint refill that serves as one of my go-to Parker-style refills when I’m looking for an ultra-fine tip ballpoint that dries quickly. While it took a bit of work to get this particular cartridge to work in the standard Caran d’Ache 849 ballpoint pen, here’s what I did:

• Step One: Unscrew the knock at the back of the Caran d’Ache 849 and remove the Goliath refill.

• Step Two: Insert the Jetstream SXR (or Schmidt P900 or Easyflow 9000 or other Parker-style ballpoint refill of your choice).

• Step Three: Replace the knock and screw it all the way down until you reach the end of the threads. You will likely have one of two issues: (1) when you retract the refill, the tip still extends past the end of the barrel, since the refill is too long; and/or (2) when you try to depress the knock, the refill won’t “catch” and stay in writing mode. To fix both of these problems, I typically unscrew the knock one or two turns, which pulls the tip of the refill back into the barrel without affecting the stability of the knock or causing rattling. (You may have to experiment a bit, depending on the refill you’re working with.)

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Note that the tip of this Jetstream SXR refill is slightly too long when the pen is retracted. You can fix this problem by unscrewing the knock one, maybe two, turns to reach your preferred length. I have not found that unscrewing the knock in this way affects the usability of the pen.

Option 3: Ohto “Flash Dry” .5mm Needle-Tip Gel Refill

The third option I plan to discuss requires the most work, though it’s still a pretty easy hack. The Ohto “Flash Dry” refill has garnered a well-deserved reputation as an excellent, relatively fast-drying needle-tip gel option that is compatible with Parker-style ballpoint pens. The problem? It’s too long to fit the standard 849 ballpoint without modification. While you might be able to adjust the refill length using the trick described above (unscrewing the knock), you can also modify the refill by shaving off a bit of the clear plastic tubing using a craft knife or sharp scissors. GO SLOWLY. You only need to shave off .5-1mm, but if you take off too much you can add back length by wrapping a small piece of washi tape around the end of the cartridge. (This one will likely take some experimentation).

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The unmodified Ohto Flash-Dry refill (left)

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To reduce the length of the refill, pull off the black plastic cap and cut a small sliver off the clear refill tubing. Replace the black plastic cap and the refill should work. If you find that you cut too much (i.e., the tip doesn’t extend all the way through the opening when the knock is depressed), simply wrap a small piece of washi tape around the end of the refill to add back length.

Note that if you don’t want to mess around with hacking the Ohto Flash Dry refill to fit in the Caran d’Ache 849 ballpoint, this refill fits the 849 Rollerball without modification, and also has it’s own Ohto Fast-Dry click-pen, which is inexpensive and which we stock in the shop.

Again, I have to emphasize that although The Gentleman Stationer is an authorized Caran d’Ache retailer, hacks like these are NOT authorized and we obviously can’t guarantee that any modifications will work in all pens, due to slight variations in refill size (and even the various editions of the 849). Proceed at your own (admittedly low) risk, and have fun making your pens work for you!

Hacking Ballpoint Pens: The Monteverde Capless Gel Refill Review

If you’re like me, and are known throughout your immediate and extended family as “the pen guy,” then you have a collection of ballpoint pens that people have given you over the years as gifts.  Some or all of them may be monogrammed or personalized in some way, making them nearly impossible to pass on or sell (setting aside, for the moment, the difficulties in selling gifts that often have sentimental value).    

Case in point:  when I graduated from law school, I was given a Montblanc Meisterstuck Classique ballpoint, with the platinum trim.  It’s a beautiful pen, if you’re into the Montblanc black and platinum/gold aesthetic.  It’s engraved with my initials, fits nicely in my hand, and is extremely comfortable to write with.  The only problem is that I hated the standard Montblanc ballpoint refill.  I found that it skipped a lot and didn’t leave a dark enough line for my taste.  Plus I found the refills obscenely expensive, costing $12 or more (unless you buy them in bulk, which I couldn't justify, seeing that I dislike the way they write).  

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Montblanc Classique Ballpoint with Platinum Trim

Enter Monteverde.  Many people may not know this, but Monteverde manufactures a line of “capless” gel refills that fit ballpoint pens from many manufacturers, including Montblanc.  I’ve outfitted the Classique with the fine blue/black Monteverde refill, and I’ve also upgraded a Parker jotter using Monteverde's Parker-compatible gel refill.  Both are great pens, and they now appear in my rotation on a weekly basis.  

One word of caution:  Monteverde’s quality control can be inconsistent.  For example, I have a Waterman retractable ballpoint that I also wanted to convert into a gel pen.  A couple years back, I purchased some of the “Waterman-compatible” gel refills and they simply didn’t fit, despite there being no visible difference from the standard Waterman refill.  Apparently, the Monteverde refill had an ever-so-slightly larger diameter, so somebody must've gotten the measurements wrong at the factory.  (The store I purchased them from ended up allowing me to exchange them for the standard Waterman ballpoint refill, which is actually pretty decent.) Amazon reviews are also mixed.  There are complaints about the Monteverde refills being scratchy, drying up, leaking, and running out quickly, though I have to say that has not been my own experience. (Note:  if you are used to writing with a ballpoint pen, gel refills WILL run out quickly if you write a lot.  There was one complaint from someone who claimed that he wrote a full page by hand every day and was surprised that the gel pen ran out after a month.  That’s par for the course, in my experience.)  In general, take Amazon reviews with a grain of salt—my personal favorite was a one-star review because the refill “does not fit fake Montblanc pens.”  

I have had nothing but good experiences with the Monteverde refills.  I’ve gone through two of them, and each has lasted me a fairly long time when used for light note-taking.  For a pack of 6, they are much less expensive than a standard Montblanc-branded refill.  They also come in blue-black (my favorite) in addition to the standard black and royal blue.

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Monteverde Softroll Ballpoint Refill (Parker-compatible) in my Maxmadco Bolt-Action Stainless Steel Pen.

If gel pens aren’t for you, Monteverde’s “softroll” ballpoint refills are also quite nice.  I have the blue-black refill in my Maxmadco stainless steel retractable pen, and I’ve enjoyed it.  The company even makes a Lamy-compatible refill.