--- title: "Diamine Polar Glow: Blue Ink With a Pink-Red Sheen" canonical: "https://stationerytimes.com/guides/diamine-polar-glow/" description: "Diamine Polar Glow explained: a 2019 Inkvent blue fountain pen ink with heavy pink-red sheen, 50 ml footed bottle, dry time, water resistance and paper tips." category: "Accessories" type: "Fountain pen ink" published: 2026-10-22 updated: 2026-10-22 author: "Ellis Penhale" publisher: "Stationery Times" sources: 7 products: - name: "Diamine Polar Glow fountain pen ink, 50 ml Inkvent bottle" brand: "Diamine" brand_origin: "United Kingdom" made_in: "United Kingdom" material: "Water-based, non-toxic, acid-free, vegan-friendly dye ink in a glass bottle (Diamine)" released: "2019" price_band: "$$ ($5–20 per item, typical US retail, October 2026)" manufacturer: "Diamine-Speciality Inks Limited, Merseyside, England" model: "Inkvent Polar Glow, 50 ml (Goulet D-DIA2013)" sku: "DIA2013" url: "https://www.diamineinks.co.uk/products/diamine-50ml-inkvent-sheen-fountain-pen-ink-polar-glow" --- # Diamine Polar Glow: Blue Ink With a Pink-Red Sheen > Diamine Polar Glow is a bright blue fountain pen ink with a strong pink-to-red sheen, first sold in Diamine's 2019 Inkvent calendar and now a regular 50 ml bottle in the Blue Edition. It's a water-based dye ink with no shimmer, a wet flow, low water resistance and a dry time of about 15 to 20 seconds. - URL: https://stationerytimes.com/guides/diamine-polar-glow/ - Category: Accessories - Author: Ellis Penhale - Published: 2026-10-22 - Updated: 2026-10-22 ![50 ml Diamine Polar Glow bottle on four short feet, with bright blue ink, beside a swab card showing pink-red sheen](https://stationerytimes.com/images/raster/diamine-polar-glow-16x9.png) *The 50 ml Inkvent bottle, drawn in proportion, with a swab of the ink.* Original drawing (SVG): . Drawings © 2026 Stationery Times, reusable with credit under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ## Product facts | Product | Brand | Brand origin | Made in | Material | Released | Price range (typical US retail, October 2026) | |---|---|---|---|---|---|---| | Diamine Polar Glow fountain pen ink, 50 ml Inkvent bottle | Diamine (by Diamine-Speciality Inks Limited, Merseyside, England) | United Kingdom | United Kingdom | Water-based, non-toxic, acid-free, vegan-friendly dye ink in a glass bottle (Diamine) | 2019 | $$: $5–20 per item | - Made in (Diamine Polar Glow fountain pen ink, 50 ml Inkvent bottle): United Kingdom. Diamine's history page says the brand makes its inks at its own facility near Aintree Racecourse, on the edge of Liverpool (see our Diamine Oxblood guide). Diamine's Polar Glow listing (read on October 22, 2026) doesn't print a country of origin. Source: https://diamineinks.co.uk/pages/history ## Key takeaways - Diamine says the 50 ml Polar Glow bottle holds full-size ink from its 2019 Inkvent Calendar, the Blue Edition. - On October 22, 2026 it was 36th on Goulet's best-seller list, with 74 reviews averaging 4.81 out of 5. - Mountain of Ink timed it at 15 seconds to dry and rated the pink sheen and shading high; Goulet measured 20 seconds or more. - Goulet lists it as not water resistant, not shimmering and not pigmented, so it suits any fountain pen. - Diamine's UK shop listed it at £10.08 (about US$13) before VAT; it sits in our $$ band in the US. ## What is Diamine Polar Glow? **It's a bright blue fountain pen ink known for heavy pink-to-red sheen, from Diamine's Inkvent range.** Diamine says it first came in the 2019 Inkvent Calendar, the Blue Edition, and is now sold in full 50 ml bottles. It's a steady seller in the US: on October 22, 2026 it was 36th on Goulet Pens' best-seller list, where 74 buyers had rated it 4.81 out of 5. Goulet sums it up as a well-behaved, sheen-heavy blue with turquoise hints. ## Diamine Polar Glow specs | Spec | Value | |---|---| | Maker | Diamine, Aintree area of Liverpool, England | | Item code | DIA2013 (Diamine); D-DIA2013 (Goulet) | | Bottle | 50 ml (1.7 fl oz) glass, Inkvent Blue Edition | | Ink type | Water-based, non-toxic, acid-free, vegan-friendly dye ink (Diamine) | | Shimmer / pigment | None / none (Goulet) | | Dry time | 15 s (Mountain of Ink); 20 s or more (Goulet) | | Water resistance | Low (Goulet); medium (Mountain of Ink) | | Sheen | High pink (Mountain of Ink); red-purple tones (Goulet) | | Flow | Wet (Goulet); average (Mountain of Ink) | | Price band | $$ ($5–20 per bottle) | On October 22, 2026 Diamine's UK shop listed the bottle at £10.08 (about US$13) before VAT, marked sold out. Diamine doesn't publish the bottle's dimensions, so our cover draws it in proportion. ![Diamine Polar Glow 50 ml bottle, with converter fills per bottle and the ink's sourced properties](https://stationerytimes.com/images/diamine-polar-glow-fills.svg) *How many converter fills one 50 ml bottle holds (bottle ÷ capacity), with Polar Glow's sourced properties.* ## How does Polar Glow look on paper? **Bright blue in normal writing, with pink to red-purple sheen where the ink pools.** Mountain of Ink calls the base a bright medium blue and rates both shading and pink sheen high; Goulet says the sheen keeps it looking deep blue with red-purple tones. The sheen depends on paper and nib. It shows best on smooth, coated paper such as [Tomoe River](https://stationerytimes.com/guides/tomoe-river-paper/) and in a wet, broad nib. On Staples copy paper, Mountain of Ink saw feathering and bleeding with every nib size. ## How fast does Polar Glow dry, and is it water resistant? **It dries in roughly 15 to 20 seconds, and it isn't water resistant.** Mountain of Ink timed 15 seconds; Goulet measured 20 seconds or more and warns that quick notes can smear. In Goulet's drip test the writing lightened to a pale turquoise but didn't fully wash away. Mountain of Ink rated water resistance medium. For anything that must survive water, use a pigment ink such as [Platinum Carbon Black](https://stationerytimes.com/guides/platinum-carbon-black-ink/). ## Which pens is Polar Glow safe for? **Any fountain pen that takes bottled ink.** Goulet lists it as not pigmented, not iron gall and not shimmering, and Diamine says its inks suit any brand of fountain pen, especially vintage ones. Goulet rates it easy to clean, with possible slight staining on light-colored pens. A clear demonstrator such as the [TWSBI ECO](https://stationerytimes.com/guides/twsbi-eco/) shows off the color; one bottle is about 28 ECO fills. ## How does it compare with other sheening blues? **It's brighter than Blue Velvet and bluer than Fire & Ice, with a pinker sheen than either.** Details for the other inks come from our guides. | Ink | Color | Sheen | Bottle | |---|---|---|---| | Diamine Polar Glow | Bright medium blue | Pink to red-purple, high | 50 ml glass | | [Diamine Blue Velvet](https://stationerytimes.com/guides/diamine-blue-velvet/) | Saturated medium-deep blue | A hint of red | 40 ml glass wedge | | [Robert Oster Fire & Ice](https://stationerytimes.com/guides/robert-oster-fire-and-ice/) | Bright blue-teal | Pink, medium | 50 ml PET | Our [best fountain pen inks](https://stationerytimes.com/guides/best-fountain-pen-inks/) roundup picks one ink for each use. ## Where is Diamine Polar Glow made? **In England.** Diamine says it makes its inks at its own facility near Aintree Racecourse, on the edge of Liverpool. The Polar Glow listing itself doesn't print a country of origin. ## Frequently asked questions ### What color is Diamine Polar Glow? A bright medium blue with turquoise hints, according to Mountain of Ink and Goulet. Where the ink pools it shows a pink to red-purple sheen. ### Is Diamine Polar Glow a shimmer ink? No. The glow is sheen, not glitter: Goulet lists it as non-shimmering, so there are no particles to clog a pen. ### Is Diamine Polar Glow waterproof? No. Goulet rates its water resistance low: a drip test lightened it to a pale turquoise, though the writing didn't fully disappear. ### Why can't I see the sheen in Polar Glow? Goulet says the sheen shows best with broader nibs on high-quality paper. Try a wet, broad nib on smooth paper such as Tomoe River rather than a fine nib on copy paper. ### Was Polar Glow in the Diamine Inkvent calendar? Yes. Diamine says the 50 ml bottles hold ink from its 2019 Inkvent Calendar, the Blue Edition. ### Does Polar Glow stain pens? Lightly at most. Goulet rates it medium-high for ease of cleaning and says it may slightly stain a light-colored pen body, which pen flush or soapy water should remove. ### Is Diamine Polar Glow made in England? Yes. Diamine says it makes its inks at its own facility on the edge of Liverpool, England. ## Sources - [Diamine (UK): Inkvent Sheen Fountain Pen Ink, Polar Glow, 50 ml (DIA2013; 2019 Inkvent Blue Edition; £10.08 ex VAT; read October 22, 2026)](https://www.diamineinks.co.uk/products/diamine-50ml-inkvent-sheen-fountain-pen-ink-polar-glow) - [Diamine: History (own facility near Aintree, Liverpool)](https://diamineinks.co.uk/pages/history) - [Goulet Pens: Diamine Polar Glow, 50 ml Bottled Ink (D-DIA2013; specs, 74 reviews; read October 22, 2026)](https://www.gouletpens.com/products/diamine-polar-glow-50ml-bottled-ink) - [Goulet Pens: Diamine Polar Glow ink review (dry time, water resistance, saturation, shading, flow, bottle)](https://www.gouletpens.com/blogs/fountain-pen-blog/diamine-polar-glow-ink-review) - [Goulet Pens: Best sellers (Polar Glow 36th on October 22, 2026)](https://www.gouletpens.com/collections/best-sellers) - [Mountain of Ink: Ink Review No. 905 Redux, Diamine Polar Glow (August 1, 2020)](https://mountainofink.com/blog/diamine-polar-glow) - [Galen Leather: Diamine Polar Glow Ink (US listing, read October 22, 2026)](https://www.galenleather.com/products/diamine-polar-glow)