Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Brand	Dianshi
Model Number	784 / 1784
Ink Type	Non-Thermal Erasable Blue-Black
Compatibility	Dianshi Small Hatch Push-Button Fountain Pens
Pack Quantity	6 Cartridges per Box
Cartridge Capacity	1.2 ml per cartridge
Material	High-grade Plastic
Erasable Mechanism	Friction-based (Requires specific pen nib)
Country of Origin	China
Shelf Life	3 Years from manufacture date

6 reviews

Anonymous

Mar 29, 2026

Rating: 3/5

Works but ink fades slowly

The cartridges fit well, but I noticed the erased marks take a few seconds to fully disappear compared to other brands. Still functional, just not instant.

Anonymous

Mar 24, 2026

Rating: 5/5

No leaks!

I travel with my fountain pen often and these cartridges have never leaked in my bag. The seal is very secure. Highly recommend for travelers.

Anonymous

Mar 13, 2026

Rating: 4/5

Good value pack

The ink flow is consistent and the color is a nice dark blue. I deducted one star only because the packaging was slightly crushed upon arrival, but the cartridges themselves were fine.

Anonymous

Mar 12, 2026

Rating: 4/5

Solid everyday ink

Standard reliable ink for daily writing. The push-button mechanism on my pen engages perfectly with these bladders. Good product overall.

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect fit for my Dianshi pen

These cartridges slide in smoothly without any leaking. The erasable ink works exactly as advertised when used with the matching pen. Very happy with this purchase.

Anonymous

Mar 02, 2026

Rating: 5/5

Great for students

My daughter uses these for her homework. Being able to erase mistakes cleanly without tearing the paper is a game changer. Will definitely buy again.

5 FAQ

Q: Are these compatible with standard international size cartridges?

A: No, these are proprietary cartridges designed specifically for Dianshi Small Hatch and 784/1784 series push-button fountain pens. They are not compatible with standard international sizes.

Q: Can I refill these cartridges with bottled ink?

A: These cartridges are designed as single-use replaceable bladders. While technically possible to inject ink with a syringe, we do not recommend it as it may void the warranty and affect the erasable properties.

Q: Does the ink disappear completely when erased?

A: Yes, when used with the correct Dianshi erasable pen nib, the friction heat causes the ink to become transparent. Please note that extreme cold may cause the writing to reappear temporarily.

Q: How many pages can one cartridge write?

A: Depending on your writing style and nib size, one 1.2ml cartridge typically lasts for approximately 15 to 20 pages of continuous A4 writing.

Q: What colors are available for this model?

A: Currently, this specific model (784/1784) is manufactured in Non-Thermal Erasable Blue-Black. Other colors may be available in different product lines.

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