OPUS 88 Demonstrator Fountain Pen - Green
A fresh, translucent green demonstrator
The Opus 88 Demo Green is a full sized demonstrator fountain pen finished in a translucent green acrylic that feels fresh and expressive. It offers ink visibility while softening the look with a natural green tone, making it more grounded than a clear demonstrator. Built with a high capacity eyedropper filling system and a shut-off valve, it is designed for long writing sessions.
What sets it apart
- High capacity eyedropper for extended writingÂ
- Shut-off valve provides added security during transport
- Translucent green acrylic that highlights ink movement
- Demonstrator body allows visibility of ink level
- Oversized design offers excellent comfort for long writing sessions
Feel in the hand
The Demo Green feels calm, steady, and naturally focused. The green tint softens the technical look of a demonstrator while still keeping the ink fully visible. It encourages relaxed writing and works especially well for everyday journaling or structured writing.
Who it’s for
- Writers who enjoy demonstrators with colour
- Ink enthusiasts who like seeing ink movement
- Users who prefer large, comfortable pens for long writing sessions
- Those who want a daily writer with personality
- Anyone who enjoys green or nature inspired desk aesthetics
Not for
- Users who prefer compact or pocket-sized pens
- Those who want cartridge or converter simplicity
- Anyone who prefers fully opaque, non-demonstrator designs
Practical tips
- Open the shut-off valve slightly while writingÂ
- Close the valve when carrying to prevent leakage
FAQs
Is the Demo Green fully transparent?
It is a translucent demonstrator, meaning ink is visible but softened by the green acrylic tone
Does it use cartridges or converters?
No, it uses an eyedropper filling system for maximum ink capacity
Do I need to add silicone grease on the grip threads to prevent leaks?
No, the design includes a thick o-ring already.
Is it suitable for beginners?
Yes, though it requires slightly more care than cartridge-based pens due to the shut-off valve
Can it handle document and shimmer inks?
Yes, but regular cleaning is recommended to maintain smooth flow
How large is the pen?
It is an oversized fountain pen designed for comfort during extended writing sessions
What other nibs is it compatible with?
Other size #12 JoWo nib units and also the nib unit from the Pilot Parallel art pen.
What’s included
- Opus 88 Demo Green Fountain Pen
- Eyedropper
- Spare small o-ring for back of nib unit
- Instruction leaflet
- Free nib tuning by LarryPOST
Ink pairing suggestions
- Forest green inks for a tonal, cohesive look
- Olive inks for an earthy, muted palette
- Sepia inks for a warm natural contrast
- Deep navy inks for structured, professional tone
Build your practice
- Pilot Iroshizuku 50mL ink for volume
- Herbin inks, lots of vivid colours
- Opus 88 replacement #12 nib unit
Specifications
- Brand:Â Opus 88
- Brand series: Demo
- Launch:Â 2024
- Origin:Â Taiwan
- Nib: Jowo #6, black stainless steel
- Nib sizes: EF, F, M, B, 1.5mm stub
- Filling system:Â Eye dropper
- Material: Acrylic, black clip
- Trim: Stainless steel
- Weight: approx. 27g (capped)
- Length: approx. 147mm (capped)
- Diametre: approx. 17mm
- Comparable size:Â Twsbi Diamond 580
Add a touch of personality to your desk.
