Most pocket pens make a compromise. They shrink the barrel, cheapen the materials, or sacrifice the nib to hit a price point — and the writing experience suffers for it. The MAJOHN RS1 Titanium Fountain Pen refuses that trade-off entirely.
Machined from aerospace-grade titanium alloy, faceted into an octagonal barrel that sits perfectly between the fingers, and sealed with a screw cap that keeps ink fresh for days of pocket carry — the RS1 is a compact pen engineered without compromise. At 110mm capped and 28g, it disappears into a shirt pocket. At 135mm posted, it writes like a full-sized pen.
This is the pen you reach for when the moment demands clarity.
Why Titanium? Why Octagonal?
Both choices are deliberate — and both solve real problems that plague lesser pocket pens.
Titanium alloy is the material of choice for precision instruments that need to be lightweight, corrosion-resistant, and built to last a lifetime. At roughly 60% the weight of steel with comparable strength, titanium gives the RS1 a 28g body that feels substantial without being heavy — the density of quality without the fatigue of mass. It won’t rust, won’t corrode, and won’t show the wear of daily carry the way brass or aluminum does.
The octagonal barrel solves the most persistent problem of round pocket pens: rolling. A round pen placed on a desk, a notebook, or a car seat rolls away. The RS1’s eight flat facets prevent that entirely — and as a secondary benefit, the facets create a natural grip geometry that keeps the pen oriented correctly in the hand without conscious effort.
Key Features
- Aerospace-Grade Titanium Alloy Body: Lightweight (28g), corrosion-resistant, and built to last decades of daily carry without degrading in appearance or performance.
- Octagonal Barrel Geometry: Eight flat facets prevent rolling, provide natural grip orientation, and give the RS1 a distinctive, architectural aesthetic that stands apart from conventional round pens.
- True Pocket Size — 110mm Capped: Fits a shirt pocket, Field Notes cover, slim leather organizer, or jacket pocket without bulk. Posts to ~135mm for full-length writing comfort.
- Screw-Cap Closure: An airtight screw cap — not a friction snap — seals the nib completely, making the RS1 safe to carry inked for days without risk of drying or leaking.
- Smooth Steel Nib (EF / F / M): Tuned for consistent ink flow across all three sizes. MAJOHN nibs run slightly fine compared to Western sizing — an EF writes like a Japanese EF, an F writes like a Japanese F/Western EF.
- Standard Converter Compatible: Accepts standard international short cartridges and most standard converters — full access to bottled ink without proprietary filling systems.
- Two Barrel Variants: Available with or without rivets — a subtle aesthetic choice that changes the visual character of the octagonal facets.
Specifications
- Brand: MAJOHN
- Model: RS1
- Body Material: Titanium Alloy
- Barrel Shape: Octagonal
- Length (Capped): 110mm
- Length (Posted): ~135mm
- Weight (Body Only): ~28g
- Nib Material: Stainless Steel
- Nib Sizes: EF / F / M
- Filling System: Cartridge / Converter (standard international)
- Cap Closure: Screw cap (airtight)
- Variants: Without Rivets / With Rivets
- Price: $110.00
Rivets or No Rivets? Choosing Your Variant
The RS1 is available in two barrel configurations — a purely aesthetic choice with no impact on writing performance:
- Without Rivets: Clean, uninterrupted facets. A more minimal, architectural look that emphasizes the geometry of the octagonal barrel. Preferred by writers who favor understated design.
- With Rivets: Small accent rivets at the facet intersections add visual texture and a more industrial, tool-like character. Preferred by EDC enthusiasts who want a pen that looks as purposeful as it performs.
Who Is the RS1 For?
- EDC (Everyday Carry) enthusiasts who want a pocket pen built to the same standard as their other carry tools
- Journal writers who carry a pocket notebook and need a pen that fits the format without compromise
- Fountain pen collectors looking for a titanium pen at a price point that doesn’t require a second mortgage
- Minimalist travelers who want one excellent pen that handles every writing task on the road
- Professionals who want a desk pen that disappears into a pocket between meetings
- Left-handed writers who benefit from the RS1’s quick-drying EF/F nib options and smooth steel nib
Frequently Asked Questions
What ink system does the MAJOHN RS1 use?
The RS1 accepts standard international short cartridges and is compatible with most standard international converters. A converter is recommended for access to the full range of bottled fountain pen inks. No proprietary filling system — standard international compatibility throughout.
Is the RS1 comfortable to write with at 110mm?
Yes — the RS1 is designed to be posted (cap placed on the end of the barrel) for a full writing length of approximately 135mm. The octagonal grip section provides excellent control even at compact length, and the screw cap posts securely without risk of falling off mid-sentence.
How heavy is the RS1?
The titanium body weighs approximately 28g — substantial enough to feel premium and purposeful in hand, light enough for extended writing sessions without fatigue. Titanium’s strength-to-weight ratio makes this balance possible in a way that steel or brass cannot match at this size.
Will the ink dry out if I carry it in my pocket all day?
No. The screw-cap closure creates an airtight seal that prevents ink evaporation during carry. The RS1 is designed specifically for pocket EDC use — you can carry it inked for days without risk of the nib drying out or the ink leaking.
Which nib size should I choose?
For fine-line journaling, small handwriting, or pocket notebooks with narrow ruling, EF or F is recommended. For everyday writing on standard paper where a more expressive, flowing line is preferred, F or M delivers a satisfying result. Note: MAJOHN nibs run slightly fine compared to Western sizing — an M writes closer to a Western F/M.
Is the RS1 suitable for left-handed writers?
Yes. The smooth steel nib and consistent ink flow make the RS1 a good choice for left-handed writers. EF or F nib sizes are particularly recommended as they deposit less ink per stroke, reducing smearing risk for underwriters and overwriters alike.
Small in size. Uncompromising in feel.
Shop the MAJOHN RS1 Titanium Fountain Pen — $110 →
