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Home Shop Gravitas Brand Gravitas - Ultemate Vac Acrylic
GravitasSKU: TTP1

Gravitas - Ultemate Vac Acrylic

€200,00 €140,00 / Sale Sold out
Tax not included. Shipping calculated at checkout.
4.92 (13 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Ultemate Vac Acrylic
€200,00 €140,00 /
Nib: Steel
Nib Size: Extra Fine
 
 
This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.
Description

Introducing the Gravitas Ultemate Vac, a groundbreaking design and Gravitas' inaugural venture into complex filling systems. This fountain pen redefines durability, incorporating titanium in key areas to ensure longevity, addressing common weaknesses found in other vacuum pens. 

The design emphasizes the utilization of exceptionally durable materials to ensure longevity. Titanium is strategically employed to reinforce vulnerable areas where other vacuum pens may falter. Despite its robust construction, the pen remains lightweight, featuring a transparent acrylic section that enables you to monitor the ink level in the second chamber.

Despite its robust construction, the fountain pen remains lightweight, featuring a transparent Ultem section that allows for easy monitoring of ink levels in the secondary chamber. Easy to clean and maintain since the whole design is put together using threads and gaskets, different from other vacuum pens assembled using glue.

The 25mm-long section, tapering from 11.9mm to 10.2mm in width, provides a comfortable grip that is well known by fountain pen users - the hour glas shape. The nib is a steel size #6 designed and manufactured by Gravitas - paired with abs plastic feeder.

With a generous capacity exceeding 2.5ml and a secondary chamber holding 0.7ml, the Ultemate Vac offers ample ink for extended writing sessions. The second chamber is equipped with a shut-off valve to prevent ink mishaps, ensuring a mess-free experience. When using the Ultimate Vac it is recommended for the end knob to be unscrewed, thus offering a more constant and wet ink flow. 

Designed for convenience, this pen can be posted and disassembled for thorough cleaning. A crucial note: when removing the nib or cleaning the pen, apply silicone grease carefully to the threads and barrel inside to maintain water-tight integrity/smooth operating plunger and prevent ink spills. The exact sleeve presented in the picture with the box of the pen is not available anymore.

Elevate your writing experience with the innovative and resilient Gravitas Ultemate Vac.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Demonstrator
- body material: Acrylic
- cap type: Screw-cap
- filling mechanism: Vacuum 
- nib material: Steel 
- nib size: Extra Fine, Fine, Medium
- postable: Yes
- trim: Silver
- length overall (closed): 150 mm
- length overall (posted): 160 mm
- body length: 142 mm
- cap length: 65 mm
- body diameter: 15 mm
- cap diameter (without clip): 16 mm
- weight (overall): 30 grams
- body weight: 25 grams
- cap weight: 5 grams

Specifications

Brand: Gravitas
Body Material: Acrylic
Cap Type:
Screw
Filling Mechanism:
Vacuum Filler
Weight Range:
30 - 39gr

Customer Reviews

Based on 13 reviews
Write a review
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92.3
100.0
M
Miguel @ USA
⭐️⭐️⭐️⭐️⭐️ Outstanding Pen and Customer Experience!

I recently purchased the GRAVITAS – ULTEMATE VAC ACRYLIC from Pen Venture, and I couldn’t be happier. This is both my first Gravitas pen and my first order from Pen Venture.

Delivery was incredibly fast—I placed my order on August 12 (evening, USA time) and the pen was in my hands by August 18 via DHL. That speed alone was impressive!

I reached out to Emy to ask about setup, and not only did he set up the nib, but he also prepped the pen and included a handwritten note thanking me for my purchase. That kind of personal touch and customer service is rare these days, and it really stood out.

As for the pen itself: I’ve been eyeing this model for a while, and when I saw it on sale, I finally decided to pull the trigger. I’m so glad I did. The ULTEMATE VAC ACRYLIC is everything I hoped for and more. I love vac-fill pens (my Pilot 823 is another favorite), and this Gravitas instantly joined that league. Even without a gold nib, it writes beautifully—smooth, consistent, and very enjoyable. The weight and balance in the hand feel fantastic, making it a true pleasure to write with.

After just one day of use, I can already say this has become one of my favorite pens. And one thing is certain: this will not be my last purchase from Pen Venture.

Thank you for everything, Emy!

— Miguel

T
Tobias
Pure Writing Joy By Gravitas

Sleek, transparent, and impeccably built, the Ultemate Vac Acrylic is as stunning to look at as it is to write with. Its flawless acrylic body showcases the clever vacuum filling system, while the perfectly tuned nib delivers smooth, consistent ink flow with zero fuss. Comfortable and well-balanced this pen turns every page into a pleasure. A true blend of beauty and performance.

P
Peter
Absolutely Superb Customer Service!

I placed my order (my first with Pen Venture) on Saturday 2 August and my Gravitas Ultemate Vac Acrylic arrived at my doorstep the following Friday, from Romania to North Carolina, USA. 6 days!!

I asked Emy if he would check the nib for smoothness and ink flow. This pen is now my smoothest, most delightful writer I have. It out performs most of my gold nibs. I couldn't be more pleased!! Not only did Emy ensure my new pen was perfect, and achieve outstanding order fulfillment, Emy wrote a personal letter of thanks. This guy is one of a kind!

If I'm looking for a special pen in the future I'm going to check Pen Venture first!

All the Best, Peter

User picture
J
Josh Tuck
Deal of the year.

If you haven't pulled the trigger on one of these yet — do so. Mine arrived quickly with a hand written letter (Not a note — a letter) telling me it was tested and tuned, and Emy did not disappoint. For me it has the perfect amount of feedback from the nib. Not too scratchy or too slippery. With a medium nib it's nice and juice on every kind of paper I've tried it on — even Tomoe River which my fine nibbed Sentries have trouble with.

I went back and forth on whether to get this or not. Ultimately, this was one of those purchases that has brought me joy every time I use it.

O
Otis M
My second Gravitas.

Writes like butter! Thanks Emi! Very smooth, low feedback, great flow.

123
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★ Reviews

Let customers speak for us

778 reviews
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49
D
Gravitas - Monster Grade 5 Titanium & Ultem | Machined Finish
Destiny Smith
An Amazing Pen

A vacuum filler pen with the ink capacity of an eyedropper filler!
I like pens with large ink reservoirs, because more is better, especially if I'm away from my ink stash. Eyedropper fillers offer the highest ink capacity, but...if you don't have a way to shut off ink flow between reservoir and nib unit, you run into "burping" issues, which can get very messy, especially if you can't see if there's ink in the cap. The solution was either a vac filler, or a "Japanese eyedropper", both of which have a plug attached to a rod that can be screwed into the opening between ink chamber and nib unit, sealing it off. My Opus 88 and Visconti Homo Sapiens have a total ink capacity of around 3.5ml. The Monster G5 has an ink capacity of 7ml. That's like 10 Standard International Short cartridges! That means most casual users might fill their Monster 2-3 times per year. Using a Fine nib, one complete fill lets you write 450 A4 pages, or about 54,000 words. Hopefully, you REALLY LOVE the ink you filled it with, because you'll be looking at that ink for a long, long time!
But not only is the ink capacity huge, the pen itself is pretty amazing, as well. The Kraken filling system, a clever variety of a vac filler system (with an improved shut off valve) that prioritizes ink capacity, is virtually unparalleled in modern pens currently on the market. The Ultem (or clear Acrylic) body of the pen is polished to crystal clarity, the metal is highly corrosion resistant titanium, and the #8 steel nib is smooth as glass.
I'm cheap, and boring, so I do most of my fountain pen writing on plain copier paper, which allows the ink to spread out, letting a Fine nib make a line like a Medium nib. I also like to use Pelikan 4001 Königsblau, because I got a good deal on the 1,000ml bottle of ink from my favorite online seller. The combination of cheap(er) paper and ink pairs really well with the Monster's #8 nib and feed; my Fine nib makes a line comparable to a Japanese Medium nib, while keeping the color richly saturated. Using standard European 5mm quad ruled paper, the nib writes thin enough to be perfectly legible. I do have to write a bit slower, though, because the generous ink flow also means longer drying times, and writing too quickly can cause smearing issue. That's a me-problem, not a pen-problem.
The nib itself is stiff, but very smooth, meeting or exceeding the smoothness of all of my JoWo #6 steel nibs. In my opinion, the combination of nib and feed make this one of the best general purpose pens you can buy, because it will work reliably on a wide variety of paper, and a wide variety of inks. As with all demonstrator type pens, avoid "high maintenance" inks, like permanent/document/waterproof inks (and Baystate Blue), because unless you're a professional writer/author, that ink is going to stay in your pen for at least a month, and your pretty clear tank may become stained permanently.

D
Gravitas - Sentry Raw Copper
Destiny Smith
Hefty, and Awesome

The Copper Sentry is one of the heaviest pens on the market. However, I find that hand fatigue is hastened more by grip section than the pen's overall weight. Moreover, the pen is back-weighted, with the center of gravity resting on the web of your hand between thumb and index finger, which makes the business end of the pen much easier to move across the page. The grip section of the pen is made from PVD coated stainless steel, and tapers from around 13mm to 11.5mm in diameter, making it ideal for a large pen.
The finish is flawless and free of blemishes and tarnish, but it will accumulate micro-scratches over time. However, unlike coated or painted pens, these scratches will me much less noticeable, because there is no bright shiny metal to contrast with the colored coating.
The nib is JoWo #6 compatible, meaning that the nib unit has the same type and size of threads as a standard JoWo nib unit, and you can most likely put a different type of JoWo #6 type nib into the nib unit. However, if you do that, be extremely cautious when putting the cap back on your modified pen; if the new nib sticks out a bit further than the original nib, there's a chance that the inside of the cap may touch/damage/destroy your new nib. And I can not tell the difference in performance between the Gravitas nib and a "genuine" JoWo #6 steel nib. The nib is smooth, with barely the hint of feedback, and ink flow is absolutely perfect, even with Pelikan 4001 Königsblau ink, which is dry enough to cause ink flow problems in some of my other pens.
The clip...is still not present on Gravitas fountain pens. And there is no roll-stop, either. So...that does limit your options in how you transport your pen, and the handy black single pen zippered pouch the pen is delivered in may become your default storage and carry option. If you're considering a pen sleeve, get one with a folding flap, to prevent the pen from sliding out of the sleeve.
Last item: ink capacity. Gravitas pens are designed for Standard International cartridges and converters. Converters hold 0.5ml, Standard International Short cartridges hold 0.7ml, and Standard International Long cartridges about 1.2ml - 1.4ml. You can "refill" cartridges with bottled ink using a blunt tip ink syringe, which gives you almost as much ink capacity as a standard piston filler pen. With a little practice, you can refill your cartridges without making (much of) a mess ;-), but keep a paper towel handy, just in case.

R
Sailor - King of Pens Ringless Ebonite | Black - Rhodium Trim |
Rodrigo Nogueira

Great service - from management of expectations, communication, delivery speed and quality packaging...and the friendly handwritten notice by Ema that did not go unnoticed.
Thank you!

L
Gravitas - Entry Raw Grade 5 Titanium
Luke
A solid upgrade to the Entry line

This is a nice upgrade to the original Aluminium body / steel section Entry. The capping experience is much more premium, and the whole pen feels premium too. The weight is exactly the same as the old one (both 24g on my scales inked and unposted) but the balance is more traditional as both body and section is Ti rather than a heavy steel section with light alu body. Also raw Ti has a slightly tacky feel so the section is grippier than the black coated steel which is helpful. I enjoy the high quality minimalist look of it a lot. The gravitas extra fine nib is also, unexpectedly, a joy. It is a little broader and wetter than I was expecting but has a touch of very pleasant feedback. I’m glad I got the EF as I think the F may have been a bit too much for my diary with normal paper.

For those looking to use this as a platform for swapping in Jowo nib units be aware that whilst the threads are the same the section is precision machined to fit the body of the gravitas/kanwrite nib unit which is a hair slimmer than most Jowos. Therefore some Jowo nib units will just about squeeze in and work fine, while others will not fit at all. So far two out of the three i’ve tried have fit with a little encouragement initially, but a third has not. I expect I can get that nib working in it by swapping it into a nib unit which does fit. So not the end of the world and I can use my other nibs but not a perfect fit for all Jowo nib units. I’m glad that the Gravitas nib is nice. Also note that I think the converter nipple is a hair thicker on the gravitas nib unit as the included converter is tight on that nib but loose on my Jowo nibs, so best to swap to a standard converter when swapping nibs, and vice versa if you put a gravitas nib in another pen, use the gravitas converter too, as my normal jowo nib converter is too tight.

User picture
D
Visconti - My Pen System Kit
Derek
Excellent customisation and personal service

Emy kindly fitted my initials to my new HomoSapiens Bronze Age. Matched the trim colour perfectly. Looks great. Emy’s personal attention to my emails and request etc were fabulous. I can highly recommend Pen Venture.

123
Review picture
Luke
A solid upgrade to the Entry line

This is a nice upgrade to the original Aluminium body / steel section Entry. The capping experience is much more premium, and the whole pen feels premium too. The weight is exactly the same as the old one (both 24g on my scales inked and unposted) but the balance is more traditional as both body and section is Ti rather than a heavy steel section with light alu body. Also raw Ti has a slightly tacky feel so the section is grippier than the black coated steel which is helpful. I enjoy the high quality minimalist look of it a lot. The gravitas extra fine nib is also, unexpectedly, a joy. It is a little broader and wetter than I was expecting but has a touch of very pleasant feedback. I’m glad I got the EF as I think the F may have been a bit too much for my diary with normal paper.

For those looking to use this as a platform for swapping in Jowo nib units be aware that whilst the threads are the same the section is precision machined to fit the body of the gravitas/kanwrite nib unit which is a hair slimmer than most Jowos. Therefore some Jowo nib units will just about squeeze in and work fine, while others will not fit at all. So far two out of the three i’ve tried have fit with a little encouragement initially, but a third has not. I expect I can get that nib working in it by swapping it into a nib unit which does fit. So not the end of the world and I can use my other nibs but not a perfect fit for all Jowo nib units. I’m glad that the Gravitas nib is nice. Also note that I think the converter nipple is a hair thicker on the gravitas nib unit as the included converter is tight on that nib but loose on my Jowo nibs, so best to swap to a standard converter when swapping nibs, and vice versa if you put a gravitas nib in another pen, use the gravitas converter too, as my normal jowo nib converter is too tight.

Gravitas - Entry Raw Grade 5 Titanium