Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Brand	Platinum
Model Number	INK-400 / SPN-100A
Ink Type	Dye-Based
Color	Black
Compatibility	Universal (Fits most standard fountain pens)
Package Quantity	6 Cartridges per pack
Cartridge Volume	0.9 ml per cartridge
Special Feature	Non-clogging formula
Origin	Japan
Recommended Use	Daily writing and sketching

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Great value pack

Good quality ink that doesn't dry out quickly. I use these for my daily journaling. Only giving 4 stars because I wish they came in blue-black as well, but the black is solid.

Anonymous

Mar 23, 2026

Rating: 5/5

No more clogging issues

My previous brand always seemed to clog if I didn't write for a few days. These Platinum cartridges keep flowing smoothly even after sitting idle for a week. Very impressed.

Anonymous

Mar 21, 2026

Rating: 3/5

Good but runs out fast

The ink quality is excellent and writes very smoothly. However, since the cartridges are on the smaller side, I find myself changing them quite frequently if I write a lot.

Anonymous

Mar 12, 2026

Rating: 5/5

Standard universal size

These are the standard European size cartridges. They work perfectly in my Lamy, Pilot, and TWSBI pens. The dye-based formula cleans up easily if you make a mess.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect fit for my vintage pen

I was worried these wouldn't fit my older fountain pen, but they slid right in. The ink flow is consistent and the black is a nice deep shade. Highly recommend for anyone needing reliable refills.

Anonymous

Mar 06, 2026

Rating: 5/5

Reliable Japanese quality

You can never go wrong with Platinum ink. It's water-resistant enough for notes but not permanent, which is exactly what I need. The packaging keeps them fresh until use.

5 FAQ

Q: Can I use these in a converter instead of directly inserting the cartridge?

A: These are pre-filled disposable cartridges. If you wish to use a converter, you would need to purchase bottled ink rather than these cartridges, though some users carefully empty them to refill, which is not recommended.

Q: Will these cartridges fit a Lamy Safari fountain pen?

A: Yes, the Lamy Safari uses standard international short cartridges, and these Platinum INK-400 cartridges are compatible with that size.

Q: What is the expiration date on these cartridges?

A: When stored in a cool, dry place away from direct sunlight, these cartridges typically remain usable for several years. Specific batch dates are printed on the box packaging.

Q: How many milliliters of ink are in each cartridge?

A: Each individual cartridge contains approximately 0.9 ml of ink.

Q: Is this ink waterproof?

A: No, this is a dye-based ink designed for smooth writing and easy cleaning. It is not waterproof and may smear if exposed to water.

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