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Home Shop Entry Level Fountain Pens Gravitas - Quark Titanium Pocket Pen
GravitasSKU: GP-FP-QK-G5TI-11/SI-SN6

Gravitas - Quark Titanium Pocket Pen

€85,00 /
Tax not included. Shipping calculated at checkout.
5.0 (5 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Quark Titanium Pocket Pen
€85,00 /
Nib: Steel
Nib Size: Extra Fine

 
 
Description

Introducing the Quark, a pocket fountain pen that redefines compact convenience without compromising on performance. The entire pen is made from grade 5 titanium making it one of the most robust yet lighter weight in the Quark metal line up and the titanium section features micro machined grooves for a solid grip when used.

Crafted to be the tiniest pen of its kind, the Quark transforms into a full-sized writing instrument when posted. Its lightweight design and ergonomically weighted section ensure a comfortable and effortless writing experience.

Featuring the new ACME double-start cap threads that offers a smoother capping and posting action, increase wear resistance and improved seal, the Quark effortlessly unveils its nib with just 0.6 turns. When posted, the cap securely threads onto the back in a mere 2 turns. The 22mm-long section, ranging from 9.85mm to 9.0mm in width, is precision-engineered from grade 5 material with micro-machined grooves and a bead-blasted finish.

Equipped with a Gravitas-production size 6 steel nib compatible with Jowo No. 6 threads and abs plastic feeder, the Quark offers versatile writing options, including Extra Fine, Fine, Medium, Broad and Fine Flex.

This pen is eye-dropper friendly, capable of holding up to 1.5ml of ink or a standard international ink cartridge. Every Quark includes a complimentary attachment, designed for conveniently securing your item to a lanyard or any carrying accessory, ensuring ease and comfort in your collection.

Elevate your writing experience with the Quark Pocket Pen – where compact meets functionality.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Silver
- body material: Grade 5 titanium
- cap type: Screw-cap
- filling mechanism: Eyedropper / Standard International Cartridge
- nib material: Steel
- nib size: Extra Fine, Fine, Medium, Broad, Fine Flex
- postable: Yes (screw to post)
- trim: Silver color
- length overall (closed): 85 mm.
- length overall (posted): 134 mm.
- body length: 82 mm.
- cap length: 58 mm.
- body diameter: 9,8 mm.
- cap diameter (without clip): 11 mm.
- weight (overall): 17 grams.
- body weight: 10 grams.
- cap weight: 7 grams.

Specifications

Brand: Gravitas
Model: Quark
Edition:
Color: Silver
Body Material: Metal
Finish:

Cap Type:
Screw
Filling Mechanism:
Cartridge Only
Postable:
Yes
Trim Color:
Length Overall (Closed): 85 mm
Length Overall (Posted): 134 mm
Body Length (Uncapped):
82 mm
Body Diameter: 9.8 mm
Cap Diameter (Without Clip): 11 mm
Weight Overall: 17 g
Body Weight: 10 g

Customer Reviews

Based on 5 reviews
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B
Bartók Csaba
The Ultimate Workhorse for the Pocket

Since this isn’t my first time using a Quark, I knew exactly what to expect, but I wanted something even tougher for work—a pen I wouldn't have to baby. In a moment of inspiration, I decided to treat myself to the Quark Titanium, and I haven't regretted it for a second.
Form & Function

The portability is where this pen truly shines. It is incredibly compact to carry, yet the moment you post the cap, the length becomes perfect. It feels balanced and sits naturally in the hand, making it a joy to use despite its small footprint.
Quality & Craftsmanship

I’ll be honest: my handwriting still isn’t the most beautiful, but this pen makes me want to write more regardless. The build quality is exceptional and clearly well-thought-out. Simply put, it’s a brilliant piece of engineering.
Verdict

I can highly recommend it to anyone looking for a reliable, "buy-it-for-life" pocket pen. Keep up the amazing work, Ben, and a huge thanks to Emy for the help!

Warm regards from Germany – a Szekler abroad.

C
C.B.
A sleek little pen.

The Quark line of Gravitas pens are such a cool lineup and the Titanium version is great when you want your tiny little pen to have a slick shine to it. The threads for capping and posting feel very secure. Having a proper #6 nib in such a portable form factor that doesn't sacrifice writing comfort when posted is almost too good to be true. All in all, a very solid pen for EDC that doesn't cut corners on quality.

P
Peter Steart
Quark titanium pocket fountain pen

A pocket sized pen with a number 6 nib. Cap screw posts on the back of the barrel making the small pen a longer pen which fits into the hand very comfortably. The cap however does not screw tightly onto the back of the barrel - there is some play with the cap and can feel slightly loose when screwed in place.
The #6 steel fine nib is very smooth in use and the front section has a nice textured finish which helps keep your fingers in position while writing. This is my second Gravitas pen and I am very happy with both pens so far.

J
Juris
"GOAT" from the small ones

this pen to me is the Greatest of all time from all the small pens i tried.
it writes like a dream (even better than many big pens, at least I feel my writing with this pen is most beautiful if that is even a term) which is most important. It is also the smallest pen I have, it is cheap, it is well built from the toughest materials. best for EDC. btw I have also some other small pocket pens with a clip and sometimes you need to find the right way how to screw the cap on the back to have the clip facing up to not bother you when you write. this pen does not have a clip = no problem :)

K
Kevin West
Small and perfectly formed

Since receiving my Gravitas Quark Up Titanium pen I have a new favourite every day carry pen. It has just edged out my Gravitas Pocket pen, which I thought would be the smallest I would find usable, but I was wrong. The Quark Up feels perfect in the hand and the fine nib is perfect lying down a good amount of ink and feeling very smooth.

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© 2026 Pen Venture - Passion Virtuous,

Review picture
Cosmin R.
A Worthy Sequel to an Awesome Pen

On its own, this pen feels very durable and premium, and the bead-blasted, matte black coated treatment gives it a very “professional” vibe. The Fine nib is bouncy and smooth, very usable on the underside as well (with added feedback, but not scratchy), the ribbed steel grip is very comfortable, the feed holds a lot of ink on its own, and the reservoirs behind it will keep it in writing condition for dozens upon dozens of pages after a fill.

The cap screws open and closed smoothly, with a very satisfying click at the end when closed; it posts deeply, and it also posts securely after being pressed down slightly on the barrel. It is light enough that it does not back-weight the pen significantly when posted.

The barrel construction, along with the newly-implemented Kraken filling system, ensure a significant amount of ink is pulled in from the first try. Much like the main cap, the blind-cap screws open and closed smoothly for refills or ink transfers between reservoirs.

Compared to its predecessor:
Fewer transparent areas overall, but the Vac 2.0’s structure feels more solid than the Ultemate Vac.
The body thickness and thread profiles are different on the Vac 2.0 than on the Ultemate Vac, no mix-and-match potential here.
The matte black coating gives the pen a more refined, premium feel on the metallic parts.
The inner lining of the cap doesn’t get stuck in the barrel thread as often, and when it does, it either slips back into correct position, or it is easier to unscrew and reposition, without the metal thread eating into the cap material.
The coated, no-breather-hole design of the new Gravitas steel nib may not be to everyone’s taste, but I like it a lot, and functionally, this nib feels more bouncy and polished, with smoother writing than its predecessor.
The feed seems to pick up a lot more ink on its own from just a 5-second dip, and the small reservoir behind it looks to have more capacity to back it up before needing to unscrew the blind cap and refill it from the large reservoir.
The Kraken filling system seems to suck up significantly more ink per pump than the mechanism from the Ultemate Vac.

Overall, a very well made fountain pen, and a thorough refinement to an already excellent design. Very satisfied with this purchase!

Gravitas - Vac 2.0 Aluminium | Black
★ Reviews

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857 reviews
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A
Gravitas - Vac 2.0 Aluminium | Black
Andreas Andersson
Substantial, reliable, and smooth

The Gravitas Vac 2.0 is an amazing tool for handwriting. The nib is smooth, distinct, and reliable, and it has some weight due to its durable materials, black aluminium/aluminum and ultem, the perfect combination of a tool which will survive most of us, still functioning if the internal vacuum piston system is cared for. I have enjoyed this fountain pen for seven days and I am pleased to say it is one of my better ones, and it is fun to use. I recommend it.

(Emy was correct: The nib has great flow, about six drops of ink will automatically flow from the nib after I have just filled it, after that no problems; tissue paper or the ink bottle under the nib until that happens is recommended, other than that: an excellent fountain pen.)

D
Tombow - Mono Sand 512B | Ink Eraser
Dan Shapiro
Mono sand combo eraser

This is good. It erases well

N
Gravitas - Vac 2.0 Aluminium | Black
Nabil Zouari
FANTASTIC !!!!!

What a fantastic pen—and customized too!

It writes beautifully and arrived surprisingly quickly, even though I’m in Canada. This is my third order from Pen Venture, and once again, the experience has been outstanding. It's always a pleasure to come back.

My Gravitas arrived perfectly tuned and was ready to write straight out of the box. I filled it with Pelikan Royal Blue, and from the very first stroke, it was smooth, consistent, and an absolute joy to use.

I own several excellent fountain pens, including a Pilot Custom 823, a Sailor 1911, and a Leonardo Momento Zero, and I can honestly say that this Gravitas holds its own among them. It is remarkably well made and comes very close to being the perfect writing instrument.

A big thank you to the entire Pen Venture team for the exceptional service, careful tuning, and attention to detail. I’m already looking forward to my next order!

C
Gravitas - Vac 2.0 Aluminium | Black
Cosmin R.
A Worthy Sequel to an Awesome Pen

On its own, this pen feels very durable and premium, and the bead-blasted, matte black coated treatment gives it a very “professional” vibe. The Fine nib is bouncy and smooth, very usable on the underside as well (with added feedback, but not scratchy), the ribbed steel grip is very comfortable, the feed holds a lot of ink on its own, and the reservoirs behind it will keep it in writing condition for dozens upon dozens of pages after a fill.

The cap screws open and closed smoothly, with a very satisfying click at the end when closed; it posts deeply, and it also posts securely after being pressed down slightly on the barrel. It is light enough that it does not back-weight the pen significantly when posted.

The barrel construction, along with the newly-implemented Kraken filling system, ensure a significant amount of ink is pulled in from the first try. Much like the main cap, the blind-cap screws open and closed smoothly for refills or ink transfers between reservoirs.

Compared to its predecessor:
Fewer transparent areas overall, but the Vac 2.0’s structure feels more solid than the Ultemate Vac.
The body thickness and thread profiles are different on the Vac 2.0 than on the Ultemate Vac, no mix-and-match potential here.
The matte black coating gives the pen a more refined, premium feel on the metallic parts.
The inner lining of the cap doesn’t get stuck in the barrel thread as often, and when it does, it either slips back into correct position, or it is easier to unscrew and reposition, without the metal thread eating into the cap material.
The coated, no-breather-hole design of the new Gravitas steel nib may not be to everyone’s taste, but I like it a lot, and functionally, this nib feels more bouncy and polished, with smoother writing than its predecessor.
The feed seems to pick up a lot more ink on its own from just a 5-second dip, and the small reservoir behind it looks to have more capacity to back it up before needing to unscrew the blind cap and refill it from the large reservoir.
The Kraken filling system seems to suck up significantly more ink per pump than the mechanism from the Ultemate Vac.

Overall, a very well made fountain pen, and a thorough refinement to an already excellent design. Very satisfied with this purchase!

User picture User picture
K
Gravitas - Vac 2.0 Aluminium | Black
Keith Schumacker
Great Little Monster

Wow!
Just like the Monster but thinner. For me it is more comfortable for longer writing sessions. The filling system is stellar. Holds lots of ink. As always Ben Walsh and Emy have delivered a innovative and enjoyable writing experience. Can't wait to see what's next. Keep up the wonderful work!

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