Sailor Seiboku 12 Dark Blue Fountain Pen Ink Cartridges
The Sailor Seiboku 12 Dark Blue Fountain Pen Ink Cartridges contain Sailor's renowned Seiboku pigment ink in a practical, clean and convenient cartridge format. Thanks to its excellent resistance to water and fading, these cartridges are an outstanding choice for important documents, professional writing, illustration and everyday use. Their ultra-fine pigment formulation allows users to enjoy the benefits of a permanent ink while maintaining a remarkably smooth and pleasant writing experience.
Seiboku Technology in Cartridge Format
Seiboku is one of the most highly regarded pigment inks in Sailor's catalogue. Its formulation uses ultra-fine pigment particles developed by the Japanese manufacturer to minimise the issues traditionally associated with permanent inks while delivering a writing experience very similar to that of a conventional dye-based ink.
The cartridge format allows users to enjoy all the qualities of Seiboku without the need for converters or bottled ink. Simply insert a cartridge into a compatible Sailor fountain pen and begin writing immediately with a clean and convenient filling system.
An Elegant and Permanent Dark Blue
Seiboku stands out for its rich and sophisticated dark blue colour while maintaining excellent readability. It offers a more distinctive appearance than traditional black ink while preserving the professional and understated character required for documents, correspondence, journals and everyday writing.
Once dry on paper, the ink provides excellent water resistance and outstanding long-term stability. These qualities make it particularly suitable for personal archives, important documents and any writing intended to remain legible for many years.
Resistance and Versatility
Sailor also highlights Seiboku's low tendency to bleed through paper and its resistance to show-through. This combination of permanence and control makes it highly appreciated by illustrators, artists and users who combine ink and watercolour in their creative work.
Its relatively fast drying time helps minimise smudging during everyday writing, while the rich colour produces crisp and highly readable lines.
Compatibility
These cartridges are compatible with Sailor fountain pens that use the brand's proprietary cartridge system. They can also be used with Ōhashidō and Taccia fountain pens, as their nibs and feed systems are manufactured by Sailor.
Frequently Asked Questions
Are these cartridges compatible with all fountain pens?
No. These cartridges are specifically designed for fountain pens compatible with Sailor cartridges.
Is this ink waterproof?
Yes. Seiboku is a pigment ink that offers excellent water resistance once dry.
Can it be used for important documents?
Yes. Its permanence and stability make it an excellent choice for documents, archives and long-term preservation.
Is it suitable for illustration?
Yes. Its water resistance, precision and low bleed-through make it very popular among illustrators and artists.
Package Contents
The product includes one Sailor box containing 12 Seiboku permanent dark blue fountain pen ink cartridges. (Product photographs are for reference only and slight variations may exist between images and the actual product.)
Technical Specifications
• Brand: Sailor
• Model: Seiboku
• Colour: Dark Blue
• Contents: 12 cartridges
• Ink type: permanent pigment fountain pen ink
• Technology: ultra-fine pigment particles
• Water resistance: water resistant once dry
• Compatibility: fountain pens compatible with cartridges Sailor
• Made in Japan
• Packaging: original Sailor box
Why Choose Sailor Seiboku?
Seiboku is one of the most respected permanent inks among fountain pen users. Its combination of archival durability, smooth writing performance and elegant dark blue colour makes it an excellent alternative to traditional permanent black inks.
At Inktraveler, we find Seiboku particularly interesting for users seeking a water-resistant ink with greater visual character than standard black while maintaining professionalism and excellent readability.
The Sailor Philosophy
Founded in Hiroshima in 1911, Sailor is one of Japan's leading names in the world of writing instruments. For more than a century, the company has developed fountain pens, nibs and inks recognised internationally for their quality, innovation and reliability.
Sailor's permanent pigment ink series demonstrates the brand's ability to combine advanced technology with practical usability, creating products capable of meeting the needs of writers, professionals and artists alike.
"Some words deserve to endure; Seiboku helps preserve them with elegance."
