--- product_id: 51337754 title: "Diamine Registrar's Bottled Ink 30ml - Blue/Black" brand: "diamine" price: "€ 30.90" currency: EUR in_stock: true reviews_count: 13 category: "Diamine" url: https://www.desertcart.hr/products/51337754-diamine-registrars-bottled-ink-30ml-blue-black store_origin: HR region: Croatia --- # color shifts from blue to black over time highly waterproof & durable 30ml archival ink volume Diamine Registrar's Bottled Ink 30ml - Blue/Black **Brand:** diamine **Price:** € 30.90 **Availability:** βœ… In Stock ## Summary > πŸ–‹οΈ Write your legacy in blue-black brilliance! ## Quick Answers - **What is this?** Diamine Registrar's Bottled Ink 30ml - Blue/Black by diamine - **How much does it cost?** € 30.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/51337754-diamine-registrars-bottled-ink-30ml-blue-black) ## Best For - diamine enthusiasts ## Why This Product - Trusted diamine brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Timeless Archival Quality:** Preserve your most important writings with ink trusted for vital records. - β€’ **Dynamic Color Transformation:** Starts as a soft blue and matures into a rich blue-black, adding depth to every stroke. - β€’ **Waterproof & Smudge-Resistant:** Ensures your notes stay crisp and legible, no matter the conditions. - β€’ **Crafted in the UK with Heritage:** Experience a historic ink used for centuries in official documentation. - β€’ **Smooth Fountain Pen Compatibility:** Dye-based formula that won’t clog your pen, perfect for daily use. ## Overview Diamine Registrar's Bottled Ink is a 30ml archival-quality, dye-based fountain pen ink from the UK that begins as a pale blue and gradually darkens to a durable blue-black. Highly waterproof and designed to resist smudging, it’s historically used for recording vital events, making it perfect for professionals who value longevity and elegance in their writing. ## Description Diamine Registrar's Bottled Ink 30ml - Blue/Black Review: Excellent ink but make sure that you know how it works! - (Written by Brenda's husband who still writes manually with a fountain pen) I've been meaning to get some for ages and when I finally got a round tuit, I was not disappointed. When you first start to write, it is as stated of a pale milky blue colour. Depending on the sort of paper that you write on, the ink quite quickly darkens in colour to an intense blue-black. It is only a matter of minutes though the final full effect could well take an hour or longer. The exact finished product seems to depend on the paper used. Some producing a blue undertone whilst I noticed that standard, computer printing paper had a mauve undertone. I wrote something on some very highly glazed paper, probably heat treated and it remained the initial blue colour. 15 hours later it looked like some standard blue-black ink that had been heavily diluted. I would thus suppose that the main agent for producing the full blue-black effect must be a reaction with the cellulose in the paper. The writing on the glazed paper was left in the light which seemed to be having very little effect. I shall enjoy further experimentation but the omens are that if you use traditional unglazed paper, you should meet with no problems and be well satisfied with the end result. Review: Good waterproof ink - Highly waterproof ink, which darkens from blue to darker blue or black, depending of time and amount of ink. Perfect for lasting writing without using pigmented ink, which might clog you pen easier; that I know of experience. ## Features - Durable, archival fountain pen ink in Blue-Black - Begins as Blue, shifts to Black over time upon paper contact - Historically used for recording vital events like births and deaths ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00DSPRM46 | | Best Sellers Rank | 22,169 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 25 in Bottled Ink | | Brand | Diamine | | Brand Name | Diamine | | Container Type | Bottle | | Country Of Origin | United Kingdom | | Customer Reviews | 4.7 out of 5 stars 204 Reviews | | Global Trade Identification Number | 00700987829853 | | Ink Colour | Blue-Black | | Item Volume | 30 Millilitres | | Item volume | 30 Millilitres | | Manufacturer | Diamine Ink | | Manufacturer Part Number | γƒ¬γ‚Έγ‚Ήγƒˆγƒ©γƒΌγ‚Ίγ‚€γƒ³γ‚― | | Model Number | Regisutrarsink | | Number of Items | 1 | | Package information | Bottle | | Paint Type | Dye-based | | Paint type | Dye-based | | UPC | 700987829853 | | Unit Count | 30 millilitre | ## Product Details - **Brand:** Diamine - **Global Trade Identification Number:** 00700987829853 - **Item volume:** 30 Millilitres - **Package information:** Bottle - **Paint type:** Dye-based ## Images ![Diamine Registrar's Bottled Ink 30ml - Blue/Black - Image 1](https://m.media-amazon.com/images/I/61Xd6Ra13OL.jpg) ![Diamine Registrar's Bottled Ink 30ml - Blue/Black - Image 2](https://m.media-amazon.com/images/I/5113zrtJwGL.jpg) ![Diamine Registrar's Bottled Ink 30ml - Blue/Black - Image 3](https://m.media-amazon.com/images/I/21YvIH2i9oL.jpg) ![Diamine Registrar's Bottled Ink 30ml - Blue/Black - Image 4](https://m.media-amazon.com/images/I/61IawfEQ93L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent ink but make sure that you know how it works! *by B***. on 18 October 2018* (Written by Brenda's husband who still writes manually with a fountain pen) I've been meaning to get some for ages and when I finally got a round tuit, I was not disappointed. When you first start to write, it is as stated of a pale milky blue colour. Depending on the sort of paper that you write on, the ink quite quickly darkens in colour to an intense blue-black. It is only a matter of minutes though the final full effect could well take an hour or longer. The exact finished product seems to depend on the paper used. Some producing a blue undertone whilst I noticed that standard, computer printing paper had a mauve undertone. I wrote something on some very highly glazed paper, probably heat treated and it remained the initial blue colour. 15 hours later it looked like some standard blue-black ink that had been heavily diluted. I would thus suppose that the main agent for producing the full blue-black effect must be a reaction with the cellulose in the paper. The writing on the glazed paper was left in the light which seemed to be having very little effect. I shall enjoy further experimentation but the omens are that if you use traditional unglazed paper, you should meet with no problems and be well satisfied with the end result. ### ⭐⭐⭐⭐⭐ Good waterproof ink *by S***I on 8 March 2019* Highly waterproof ink, which darkens from blue to darker blue or black, depending of time and amount of ink. Perfect for lasting writing without using pigmented ink, which might clog you pen easier; that I know of experience. ### ⭐⭐⭐⭐ Interesting ink. *by L***L on 19 February 2026* Does not bleed through crap paper and dries very quickly. This ink does not work well in my fine nibbed Platinum fountain pen and dries up mid writing. Much better in a medium nib. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/51337754-diamine-registrars-bottled-ink-30ml-blue-black](https://www.desertcart.hr/products/51337754-diamine-registrars-bottled-ink-30ml-blue-black) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-24*