Posts filed under Octopus Fluids

Octopus Fluids Purpur Ink Review

(Jeff Abbott is a regular contributor at The Pen Addict. You can find more from Jeff online at Draft Evolution and Twitter.)

It's getting difficult to keep up with all the new ink makers that have popped up in the past couple of years, and I'm not complaining. The latest new ink to hit my desk comes from Octopus Fluids in Germany, and it's a gorgeous purple ink with a little bit of shading and lots of personality.

Octopus Fluids Purpur is a medium purple with a little hint of red that makes it a great choice for everyday writing and doodling. This color is part of the standard line of inks that Octopus Fluids offer, and I think it's a great standard representation of purple. It's not as vibrant as some, but it's also dark enough to make it easy to use in a professional setting.

Writing with this ink is a pleasant experience. It flows easily and smoothly, and works well with all the pens I've tried it with so far. The ink doesn't feather or bleed, and it cleans up easily as well. There's a bit of shading in this ink, but it isn't extreme. In the medium cursive italic nib I've been using recently, you can see slight color variation in each stroke, but it doesn't jump out at you. Still, it does add just a touch of variation that indicates that a fountain pen was used to make the marks.

An interesting feature of this ink that I've only seen when doing swatches or making large pools of ink is that there's a reddish sheen that hangs on top of the dried ink. It looks great under the right light, but it's only easy to pick out in swatches or areas where ink has pooled significantly. Realistically, you won't see the sheen under normal writing circumstances.

Dry time for this ink does leave something to be desired, though. In my testing, the ink normally took between 20 and 40 seconds to dry to the point where it wasn't easy to smudge with light pressure. This isn't the slowest ink to dry in my testing, but it is pretty slow. Definitely something to consider if you're left handed or want to use this ink in a notebook where you plan on quickly jotting down notes and closing the book. There will be ink spots on your hands and/or opposite pages of your notebook.

Despite the dry time, I have zero complaints with this ink. I'm partial already to purple inks, and this color just makes me happy when I'm using it. It's not as bright as some of my other purple inks, but the medium hue is gorgeous and makes it easy to use in any setting while still being obviously purple.

I'm excited to explore more from Octopus Fluids because my initial exposure with this ink has been a great experience. The 30ml bottle of Purpur cost $14, so the price is fairly standard for other small-shop ink vendors. Vanness also offer a small 4ml sample vial if you want to try it out (and others while you're at it) to see if you want to commit to a larger bottle. Try out Octopus Fluids the next time you're able!

(Vanness Pens provided this product at no charge to The Pen Addict for review purposes.)


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Posted on July 12, 2023 and filed under Octopus Fluids, Ink Reviews.

Octopus Fluids Petrol Buffalo Pigmented Ink Review

Octopus Fluids Petrol Buffalo Pigmented Ink Review

You may not have heard of Octopus Fluids prior to this review, but don’t be fooled: this is a big-time company. With a lineage dating back prior to 1900, the modern version of this German brand focuses on the industrial ink market, supplying manufacturers of varying sizes with ink used in large-scale production.

Over the last decade-plus, Octopus Fluids has used that expertise to expand into what they call the creative market. Ink for dyeing resins, alcohol-based ink for art, stamp ink, and so on. Importantly, for us Pen Addicts, Octopus branched out into fountain pen inks, which I have started to test, beginning with this review of Write & Draw Petrol Buffalo.

Octopus Fluids Petrol Buffalo

Octopus has two primary ink lineups for pen hobbyists: standard, and pigmented. The basic writing inks are simply marked Octopus Fluids, and ship in Pelikan-esque 30 ml bottles. The ink in this lineup is designed to be easy to use and clean, and is not waterproof. The pigmented inks are marked as the Write & Draw series, and are contained in taller, 50 ml bottles. These inks are designed to be permanent on the page, and require a little more consideration around their use and cleaning.

Octopus Fluids Petrol Buffalo

Petrol Buffalo is a beautiful dark teal-blue, which I inked up in my TWSBI 580ALR Prussian Blue pen, with a 1.1 mm stub nib. I like to use this pen for ink reviews for two reasons: the stub nib spreads the ink well, and the clear barrel shows if their is any staining, which is an important consideration for a pigmented ink.

Octopus Fluids Petrol Buffalo

From a writing perspective, Petrol Buffalo is fantastic. The flow is nice and smooth from this 1.1 mm nib, with various amounts of shading and light sheen depending on the paper being used. The color is relatively flat on bank paper, and shows more character on slower drying papers like Sanzen Tomoe River.

Octopus Fluids Petrol Buffalo
Octopus Fluids Petrol Buffalo

Top, dry, on Sanzen Tomoe River. Bottom, fully soaked under the faucet.

Permanence-wise, it is rock-solid under the faucet. Once dry, it is completely waterproof, with barely a fuzzy line edge to be seen. This level of performance is why you would buy a pigmented ink. Do know that you will want to take added care with any pigmented ink filled in your pen. If you leave the nib uncapped, it will dry out quicker than with a standard ink. Also, it could stain your barrel if you leave it inked for long periods of time. Time will tell on this one.

Octopus Fluids Petrol Buffalo

I don’t hesitate to use pigmented inks in most pens, but given the added care required, I will be particular to choose one that is easily cleanable, and that I will be using daily. If it isn’t in my regular writing rotation, it gets cleaned.

I’m impressed with my first Octopus Fluids experience so far. I’m a pigmented ink fan due to the colors available and permanence of the formula, and this Write & Draw Petrol Buffalo is as good as any as I have used. The price is right, too, at just over $17 for a 50 ml bottle. I have some of their standard inks on hand also, and so far so good with those as well. If their formulas or colors are something that ticks your boxes, I wouldn’t hesitate to recommend them.

(Vanness Pens provided this product at no charge to The Pen Addict for review purposes.)


Enjoy reading The Pen Addict? Then consider becoming a member to receive additional weekly content, giveaways, and discounts in The Pen Addict shop. Plus, you support me and the site directly, for which I am very grateful.

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Octopus Fluids Petrol Buffalo
Posted on March 6, 2023 and filed under Octopus Fluids, Ink Reviews.