Inktend / Pen library / 3776 Century
Platinum
3776 Century
Home of Platinum's ultra-fine nibs and the slip-and-seal cap that keeps a pen wet after months uncapped.
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. This model — 3776 Century — dates to 1978, named for the height in meters of Mt. Fuji.
How to fill the Platinum 3776 Century
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 3776 Century'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 3776 Century
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
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Specs on this page have been individually verified against manufacturer and retailer listings.