Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Brand	Platinum
Ink Type	Dye-Based Non-Carbon
Cartridge Model	INK-400
Converter Model	CONV-800A
Compatibility	Universal European Standard
Package Contents	6 Cartridges + 1 Converter
Ink Color	Black
Special Feature	Clog-Resistant Formula
Country of Origin	Japan
Item Weight	15 grams

6 reviews

Anonymous

Mar 17, 2026

Rating: 5/5

Finally, no more clogged pens!

I have several vintage fountain pens that would always dry out and clog with other inks. The Platinum INK-400 has been a lifesaver. It flows smoothly even after sitting unused for a week. The included converter is sturdy and holds a good amount of ink.

Anonymous

Mar 09, 2026

Rating: 5/5

Smooth operator

The flow consistency is impressive. No hard starts or skipping. The CONV-800A converter has a nice piston mechanism that feels premium compared to cheaper alternatives I've tried.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for students

Bought this for my daughter who uses her fountain pen sporadically. She used to struggle with hardened ink, but this dye-based formula stays liquid. The converter is easy for her to clean and refill herself.

Anonymous

Mar 04, 2026

Rating: 4/5

Great value bundle

The cartridges fit perfectly in my Lamy Safari. The ink is very wet and lubricated, which makes writing a pleasure. I took off one star because the black isn't as deep as some carbon inks, but for daily writing, it's excellent.

Anonymous

Mar 04, 2026

Rating: 4/5

Good standard black

Reliable ink for everyday note-taking. It dries reasonably fast on standard paper without too much feathering. The pack provides great value since you get both cartridges and a converter to try both methods.

Anonymous

Mar 02, 2026

Rating: 5/5

Saved my old Parker

My old Parker pen was practically unusable with other brands due to clogging. After flushing it and using these Platinum cartridges, it writes like new again. Highly recommend for anyone with finicky pens.

5 FAQ

Q: Is this ink waterproof?

A: No, this is a dye-based non-carbon ink, so it is not waterproof. It is designed specifically for smooth flow and preventing clogs rather than water resistance.

Q: Will these cartridges fit a Pilot Metropolitan pen?

A: Yes, the INK-400 cartridges follow the standard European size, which is compatible with the Pilot Metropolitan, Lamy, Twsbi, and most other major fountain pen brands.

Q: Does the ink come in colors other than black?

A: This specific bundle includes only the Black INK-400 cartridges. However, Platinum offers the INK-400 series in various colors like Blue, Red, and Green sold separately.

Q: Can I mix this ink with other brands in the same pen?

A: While technically possible, we generally recommend flushing your pen thoroughly with water before switching ink brands to prevent any chemical reactions or color muddying.

Q: How much ink does the CONV-800A converter hold?

A: The CONV-800A typically holds approximately 0.9ml to 1.0ml of ink, which is slightly more than a standard cartridge.

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