UNI SXR-600 Jet Stream Refill vs Artline Supreme Permanent Marker Review: The UK's Best Everyday Writing Consumables 2026
Jun 28, 2026
UNI SXR-600 Jet Stream Refill vs Artline Supreme Permanent Marker Review: The UK's Best Everyday Writing Consumables 2026
Not every great writing product is a fountain pen or a premium pencil. Some of the most important tools in any writer's or professional's arsenal are the everyday consumables that keep their pens writing and their markers marking. In this review, we compare two outstanding everyday writing consumables: the UNI SXR-600 Jet Stream Ballpoint Refill, the world's smoothest ballpoint refill, and the Artline Supreme Permanent Marker 4-Pack, a professional-grade permanent marker set that delivers bold, reliable marks on any surface. Both are available from TTPEN UK and both have earned strong sales records among UK buyers.
UNI SXR-600 Jet Stream Refill — The World's Smoothest Ballpoint, Refillable
The UNI SXR-600 Jet Stream Ballpoint Pen Refill 0.5/0.7mm Black Ink is the refill that powers one of the world's most celebrated ballpoint pens. At £12.00, it allows you to continue enjoying the legendary Jet Stream writing experience in your existing pen, making it one of the most cost-effective upgrades available for any ballpoint pen user.
The Jet Stream Technology
Jet Stream is Uni's proprietary low-viscosity ink technology that transformed the ballpoint pen market when it was introduced. Conventional ballpoint ink is thick and viscous, which is why ballpoints often feel scratchy and require significant pressure to write. Jet Stream ink is formulated to be significantly less viscous, allowing it to flow more freely from the ball and onto the paper with far less friction.
The result is a ballpoint writing experience that is dramatically smoother than conventional ballpoints — closer to a gel pen or even a fountain pen in terms of smoothness, but with the reliability and durability of a ballpoint. The ink dries almost instantly, eliminating smudging, and it is water-resistant and fade-resistant, making it ideal for important documents.
Compatibility and Convenience
The SXR-600 refill is compatible with a wide range of Uni Jetstream pen bodies, including the popular Jetstream single and multi-pen models. The 0.5mm and 0.7mm options cater to different writing preferences — the 0.5mm for precise, fine writing and the 0.7mm for a slightly bolder, more expressive line.
Using a refill rather than replacing the entire pen is both economical and sustainable — you reduce waste and save money while continuing to enjoy the same premium writing experience. For UK professionals who use their Jet Stream pen daily, keeping a supply of SXR-600 refills ensures they're never caught without their favourite writing instrument.
Who Is the SXR-600 For?
The SXR-600 is for anyone who owns a compatible Uni Jet Stream pen and wants to continue enjoying its legendary smooth writing experience. It's also an excellent introduction to Jet Stream technology for those who haven't yet experienced it — the refill can be used to upgrade compatible pen bodies to Jet Stream performance.
Price: £12.00 — Buy the UNI SXR-600 Jet Stream Refill at TTPEN UK
Artline Supreme Permanent Marker 4-Pack — Professional Permanence in Every Stroke
The Artline Supreme Permanent Marker 1.0mm Bullet Nib 4-Pack is a professional-grade permanent marker set that delivers bold, reliable marks on virtually any surface. At £10.00 for a pack of four, it offers exceptional value for a marker that is used by professionals, artists, and everyday writers across the UK.
The Artline Supreme Difference
Artline is an Australian brand with a strong reputation for quality markers and pens, and the Supreme Permanent Marker is one of their flagship products. The “Supreme” designation reflects the quality of the ink formulation — a permanent, quick-drying ink that adheres to paper, cardboard, plastic, glass, metal, and most other surfaces without smearing or fading.
The 1.0mm bullet nib delivers a bold, consistent line that is ideal for labelling, signing, marking, and any application where a clear, permanent mark is required. The bullet tip is versatile — it can be used at different angles to produce lines of varying widths, from a precise 1.0mm line to a broader stroke for filling larger areas.
The 4-Pack Advantage
The 4-pack format is one of the most practical aspects of the Artline Supreme. Having four markers means you always have a spare, and the pack is excellent value compared to buying individual markers. The four markers in the pack are typically in a range of colours — black, blue, red, and green — providing the essential colour set for colour-coded labelling and marking.
For UK offices, the Artline Supreme 4-pack is a staple supply item. For teachers, the markers are ideal for marking student work and creating classroom displays. For warehouse and logistics workers, they're essential for labelling boxes and packages. For artists, they're a reliable tool for bold line work and mixed-media projects.
Who Is the Artline Supreme For?
The Artline Supreme is for anyone who needs a reliable, professional-grade permanent marker for everyday use. Office workers, teachers, warehouse staff, artists, and anyone who labels, marks, or signs regularly will find the 4-pack an indispensable supply. At £10.00, it's one of the best-value permanent marker sets available in the UK.
Price: £10.00 (4-pack) — Buy the Artline Supreme 4-Pack at TTPEN UK
Side-by-Side Comparison
| Feature | UNI SXR-600 Jet Stream Refill | Artline Supreme Permanent 4-Pack |
|---|---|---|
| Price | £12.00 | £10.00 |
| Type | Ballpoint pen refill | Permanent marker (4-pack) |
| Ink Technology | Low-viscosity Jet Stream | Quick-dry permanent ink |
| Best Surface | Paper | Any surface |
| Best For | Jet Stream pen owners, smooth writing | Offices, teachers, labelling, marking |
Two Essential Consumables for Every UK Writer and Professional
The UNI SXR-600 Jet Stream Refill and Artline Supreme Permanent Marker serve different but equally important roles in the everyday writing toolkit. The Jet Stream Refill is for those who want the smoothest possible ballpoint writing experience — a premium upgrade that transforms any compatible pen into a Jet Stream writer.
The Artline Supreme 4-Pack is for those who need reliable, professional-grade permanent marking capability — a versatile set that covers every colour-coding and labelling need in a single, affordable purchase.
- UNI SXR-600 Jet Stream Ballpoint Refill 0.5/0.7mm — £12.00
- Artline Supreme Permanent Marker 1.0mm 4-Pack — £10.00
Both are available from TTPEN UK with fast UK delivery. Visit www.ttpen.co.uk to browse our full range of writing consumables, refills, and markers.
Final Verdict
The UNI SXR-600 Jet Stream Refill and Artline Supreme Permanent Marker are two of the most practical and reliable writing consumables available in the UK market. Both deliver professional-grade performance at accessible prices, and both earn our highest recommendation for UK writers, students, and professionals. Visit TTPEN UK today.
