Inktend / Pen library / Classic Brush Pen
Platinum
Classic Brush Pen
A model in Platinum's fountain pen lineup. Specs below reflect the typical configuration across Platinum's core range.
A natural second or third pen for someone who's confirmed they enjoy the hobby and wants a nicer nib — not usually the first pen someone buys, but a common upgrade target.
Specs
About Platinum
Founded in Tokyo in 1919, Platinum is one of Japan's "big three" pen makers, best known for the slip-and-seal cap technology that keeps a pen from drying out for months.
How to fill the Platinum Classic Brush Pen
Fill it two ways: snap in a pre-filled international cartridge for convenience, or use a converter — a small plunger or twist mechanism that installs the same way a cartridge does — to draw ink from any bottle. The converter route opens up the entire world of bottled ink, which is where most of the hobby's color variety lives.
Choosing a nib size
Nib size determines line width, not writing pressure — fountain pens are meant to glide, never press. Extra-fine (EF) suits small, dense handwriting and thin paper; fine (F) is the most broadly recommended default; medium (M) shows more ink character and shading; broad (B) and stub grinds favor bold, expressive strokes and calligraphy-adjacent writing. The Classic Brush Pen's gold nib will also flex slightly with pressure, giving line variation that a steel nib of the same size won't produce.
Keeping it clean
A quick flush with cool water every time you switch ink colors — and a full clean every 4–6 weeks of regular use — is enough to keep the nib and feed performing well. Inktend's cleaning reminder is tuned to a 21-day baseline and adjusts naturally to how often you actually refill.
Pairing inks with the Classic Brush Pen
Because refills are quick with a cartridge or converter, this is a good pen for rotating through several colors rather than committing to one; sample vials work especially well here.
Frequently asked questions
More from Platinum
Specs reflect the typical configuration across Platinum's core lineup rather than this exact model — check current listings before buying.