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Home Diamine - Neptune Blue | Exclusive Pen Venture | - Bottled Ink 80 ml
DiamineSKU:

Diamine - Neptune Blue | Exclusive Pen Venture | - Bottled Ink 80 ml

€14,00 /
Tax not included. Shipping calculated at checkout.
5.0 (6 reviews)
Diamine - Neptune Blue | Exclusive Pen Venture | - Bottled Ink 80 ml
€14,00 /
 
 
Description

Diamine - Neptune Blue is a fountain pen ink that draws its inspiration from my cherished childhood memories, made to be retailed exclusively through Pen Venture.

It hearkens back to the days when my family and I frequented the Romanian shores of Neptun, from the Black Sea. I vividly recall those moonlit evenings spent strolling with my mother and my sister, Emanuela, along the water's edge. The moon's gentle reflection on the waves, a wistful reminder of those treasured moments, even if my dear sister, Emanuela, now resides in our hearts.

For added depth, I've incorporated a subtle hint of bronze or red sheen. This ink strikes a perfect balance, offering just the right amount of sheen to enhance your writing experience without compromising on easy cleaning and quicker drying times.

Diamine inks are suited for all brands of fountain pens. This glass bottle has a volume of 80ml of ink.

Brand: Diamine 
Type: Bottled Ink
Color: Blue Black
Shimmer: No
Sheen: Yes
Shading: No
Water Resistant: No
Volume: 80ml
Bottle Material: Glass

Specifications

Brand: Diamine
Packaging:
Bottled Ink
Compatible with:
Fountain Pen
Color:
Blue Black
Shimmer:
No
Sheen: Yes
Shading: No
Water Resistant:
No
Volume: 80 mL
Container Material: Glass

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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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862 reviews
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S
Gravitas - Quark Zirconium Stone Washed Pocket Pen | New |
Scott Y
Quark, xf

Skipped so much I had to replace the nib unit with parts from my storage. Quite disappointing. The cap now screws on, I preferred the slip cap. It's faster. It's working now but I won't be spending any more money on gravitas.

J
Gravitas - Vac 2.0 Aluminium | Black
Jonathan
The Vac 2

The Vac 2 is a refinement of both the Monster and the previous Gravitas vac fillers. This is a very robust, beautifully balanced writer that will bring pleasure to even the most particular purchaser. The filling system holds just the right quantity of ink. Long writing sessions are a breeze without the risk of having ink sit in the pen for extended periods. I have used this pen extensively since it arrived and have found it to be consistent and reliable. The nib is smooth and flows evenly with the lightest of touches. I prefer this pen over the monster because of its size and balance. The Vac 2 becomes an extension of my hand, allowing me to forget its presence and locus entirely, focusing on what I am writing.

A
Gravitas - Vac 2.0 Aluminium | Black
Anousheh

Excellent service. Love the pen. Thank you.
🙏🙏

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

123