Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Brand	Hero
Ink Type	Heat-Sensitive Erasable
Cartridge Caliber	3.4mm
Package Quantity	30 Pieces
Ink Color	Blue Black
Erase Method	Friction Heat (Rubbing)
Target Audience	Students and Children
Compatibility	Standard 3.4mm Fountain Pens
Packaging Type	Bucket Pack
Country of Origin	China

6 reviews

Anonymous

Mar 24, 2026

Rating: 4/5

Reliable replacement cartridges

Easy to swap out and the ink color is consistent. Not completely invisible when erased, but faint enough for corrections.

Anonymous

Mar 22, 2026

Rating: 5/5

Great for practicing handwriting

My son is learning cursive and these allow him to practice without wasting paper. The bucket pack will last us the whole school year.

Anonymous

Mar 10, 2026

Rating: 5/5

Smooth writing experience

I was worried these might be scratchy, but they write just like regular ink until you need to erase. The 3.4mm fit is perfect for my Hero pen.

Anonymous

Mar 10, 2026

Rating: 4/5

Good value for bulk pack

Buying 30 at once is very economical. The erasing works well with friction, though you have to rub a bit firmly. Great for school supplies.

Anonymous

Mar 06, 2026

Rating: 5/5

Perfect for my daughter's homework

These cartridges are a lifesaver! My daughter makes fewer mistakes now because she can easily erase them by rubbing the paper. The ink flows smoothly and doesn't skip.

Anonymous

Mar 02, 2026

Rating: 3/5

Works but fades in hot cars

The erasing feature is cool, but I left my notebook in the car on a sunny day and some notes disappeared. Just be careful with heat exposure.

5 FAQ

Q: Can I use this ink for official documents?

A: We do not recommend using heat-sensitive erasable ink for legal, financial, or official documents, as the ink can potentially fade under high temperatures or be altered.

Q: Does the ink come back if I put the paper in the freezer?

A: Yes, that is a unique property of this thermochromic ink. If exposed to temperatures below approximately -10°C (14°F), the erased writing may reappear.

Q: How exactly do I erase the ink?

A: Simply rub the written area firmly with the rubber eraser tip found on most compatible pens or a standard rubber eraser. The friction generates enough heat to make the ink disappear.

Q: Will these fit a standard Pilot FriXion pen?

A: These cartridges are designed for pens with a 3.4mm caliber. While some Pilot models use similar sizes, we recommend checking your specific pen's cartridge diameter before purchasing to ensure compatibility.

Q: Are all 30 cartridges the same color?

A: Yes, this bucket pack contains 30 cartridges of the same ink color, typically Blue Black, unless otherwise specified in the product variation selected.

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