Platinum PROCYON PNS-5000 Fountain Pen – Iridium Nib | F 0.38mm / M 0.5mm | Turquoise / Persimmon / Lemon / Deep Sea / White / Carmine / Dark Mica

Platinum PROCYON PNS-5000 Fountain Pen – Iridium Nib | F 0.38mm / M 0.5mm | 7 Colour Options

Colour is a language. The Platinum PROCYON PNS-5000 speaks it fluently. One of Platinum’s most visually striking fountain pens, the PROCYON pairs a precision iridium-tipped steel nib with a boldly coloured resin barrel that makes it as pleasurable to look at as it is to write with. Available in seven expressive colourways — Turquoise, Persimmon, Lemon, Deep Sea, Ceramic White, Carmine, and Dark Mica — and two nib widths — F (0.38mm) for precise, fine writing and M (0.5mm) for a smoother, broader line — the PROCYON is a fountain pen designed to be chosen personally, used daily, and noticed immediately.

Engineered in Japan. Built to write for a lifetime.

✒️ Product Highlights

• Brand: Platinum Pen Co., Ltd. (Japan) — established 1919
• Model: PROCYON PNS-5000
• Nib material: Stainless steel with iridium tip — durable, smooth, and consistent
• Nib sizes available: F (Fine, 0.38mm) / M (Medium, 0.5mm)
• Barrel material: High-quality resin — lightweight, durable, vivid colour depth
• Colour options: Turquoise / Persimmon / Lemon / Deep Sea / Ceramic White / Carmine / Dark Mica
• Cap mechanism: Slip & Seal cap — Platinum’s proprietary inner cap seals the nib airtight to prevent ink evaporation and skipping after long periods without use
• Ink system: Accepts standard Platinum cartridges and Platinum PQR-200 / CONV-800A converters (sold separately)
• Origin: Made in Japan
• Ideal for: Daily writers, fountain pen enthusiasts, students, professionals, collectors seeking colour variety

🎨 Seven Colours – Each One a Statement

• Turquoise — Cool, vivid, and instantly eye-catching. The colour of clear water and creative energy.
• Persimmon — Warm amber-orange with an organic richness. Distinct without being loud.
• Lemon — Bright, optimistic, and unapologetically cheerful. The most distinctive pen in any pencil case.
• Deep Sea — A deep, moody blue-green that shifts with the light. Sophisticated and quietly striking.
• Ceramic White — Clean, minimal, and endlessly versatile. The classic choice for any aesthetic.
• Carmine — A rich, deep red with warmth and depth. Bold without being aggressive. A collector favourite.
• Dark Mica — A deep, glittering grey-black with subtle metallic shimmer. For those who prefer their pens like a good espresso: dark, complex, and refined.

🔍 F vs. M – Choosing Your Nib Width

The PROCYON is available in two nib widths. Japanese nib sizing runs slightly narrower than European equivalents — keep this in mind when selecting.

• F (Fine, 0.38mm) — A precise, controlled line ideal for small handwriting, detailed note-taking, journaling in tight margins, and anyone who prefers a clean, defined mark. Recommended for writers who use Japanese or complex script characters, or who prefer ink to dry quickly on the page.
• M (Medium, 0.5mm) — A smoother, more expressive line with greater ink flow. Ideal for longer writing sessions, Western scripts, and anyone who prioritises writing comfort and line character over precision width.

🔒 Platinum Slip & Seal Cap – The Ink That Stays Ready

One of the PROCYON’s most practical features is its Slip & Seal cap — Platinum’s proprietary inner cap system that creates an airtight seal around the nib when the pen is capped. Unlike standard fountain pens that can dry out within hours or days of being left uncapped, the Slip & Seal mechanism keeps the nib hydrated and ready to write for extended periods — even after weeks of disuse. For writers who carry multiple pens or use their PROCYON intermittently, this feature alone makes it a standout choice in its price category.

📦 What’s in the Box

• 1 × Platinum PROCYON PNS-5000 Fountain Pen in your selected colour and nib size
• 1 × Platinum ink cartridge (pre-installed or included)
• Original Platinum packaging

❓ Frequently Asked Questions

Q: What colours and nib sizes are available?

A: The PROCYON PNS-5000 is available in seven barrel colours — Turquoise, Persimmon, Lemon, Deep Sea, Ceramic White, Carmine, and Dark Mica — and two nib sizes: F (Fine, 0.38mm) and M (Medium, 0.5mm). Select your preferred combination from the options above before adding to cart.

Q: Is the nib gold or steel?

A: The PROCYON PNS-5000 features a stainless steel nib with an iridium tip. The iridium tipping provides smooth, consistent ink flow and long-term wear resistance. It is not a gold nib — for a gold nib option, please see Platinum’s higher-tier models such as the Century 3776.

Q: Which nib size should I choose – F or M?

A: If you have small, neat handwriting, prefer fine lines, write in Japanese or other complex scripts, or want ink to dry quickly — choose F (0.38mm). If you have larger handwriting, write in Western scripts, prioritise smooth flow, or prefer a more expressive line — choose M (0.5mm). Note that Japanese nibs run slightly narrower than European equivalents; an F from Platinum writes closer to a European EF.

Q: What is the Slip & Seal cap and why does it matter?

A: The Slip & Seal cap is Platinum’s proprietary inner cap mechanism that creates an airtight seal around the nib when capped. This prevents ink from evaporating and the nib from drying out, even if the pen is left unused for weeks. It is one of the PROCYON’s most practical features and a key reason many writers choose Platinum over other brands in this price range.

Q: What ink system does the PROCYON use?

A: The PROCYON accepts standard Platinum ink cartridges (short and long) and is also compatible with the Platinum PQR-200 piston converter and Platinum CONV-800A vacuum converter (both sold separately), allowing you to use any bottled fountain pen ink.

Q: Can I use non-Platinum inks in this pen?

A: Yes, with a compatible converter. Using the PQR-200 or CONV-800A converter, you can fill the PROCYON with any standard bottled fountain pen ink from any brand. We recommend thoroughly flushing the pen with clean water before switching between ink brands or colours.

Q: Is this pen suitable for beginners?

A: Yes. The PROCYON is widely regarded as an excellent mid-range fountain pen that is approachable for beginners while satisfying for experienced users. The steel nib is smooth and forgiving, the cartridge system is simple to use, and the Slip & Seal cap means it will still write reliably even if you forget about it for a few weeks.

Q: How does the PROCYON compare to the Platinum Preppy or Century 3776?

A: The Preppy is Platinum’s entry-level pen — affordable and functional but with a plastic body and basic construction. The PROCYON is a significant step up: resin barrel, iridium-tipped steel nib, Slip & Seal cap, and a premium aesthetic. The Century 3776 is Platinum’s flagship — featuring a 14K gold nib and elevated materials throughout. The PROCYON sits comfortably in the mid-range sweet spot between everyday accessibility and genuine quality.