Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Other Functional Pens
Origin	-
Ink Color	Blue
Disappearance Time	Approx. 30-60 minutes
Tip Size	0.5mm
Compatible Pen Type	Groove Control Practice Pens
Package Quantity	20 Refills per Pack
Target Audience	Elementary School Students
Material	Non-toxic Plastic and Gel Ink
Usage Scenario	Handwriting Practice Copybooks
Refill Length	110mm
Special Feature	Auto-fading for Repeated Practice

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Perfect for my daughter's handwriting practice

These refills are a lifesaver! My daughter can practice her letters over and over without wasting paper. The ink fades just fast enough to let her try again.

Anonymous

Mar 18, 2026

Rating: 5/5

Teacher approved!

I bought these for my classroom. The kids love being able to erase their mistakes naturally. Highly recommend for early learners.

Anonymous

Mar 15, 2026

Rating: 4/5

Great eco-friendly option

Reduces paper waste significantly. The ink quality is good, though sometimes the fading leaves a very faint shadow, which is actually helpful to see progress.

Anonymous

Mar 09, 2026

Rating: 3/5

Decent but not magic

It works as described, but don't expect it to vanish instantly. It takes about an hour. Still useful for saving on copybook costs though.

Anonymous

Mar 07, 2026

Rating: 4/5

Good value but fades quickly

Great product overall. The only downside is that the ink disappears a bit faster than expected in hot weather, but still good for daily drills.

Anonymous

Mar 06, 2026

Rating: 5/5

Fits perfectly in groove pens

I was worried these wouldn't fit our specific brand of groove pens, but they slide right in. The writing flow is smooth and consistent.

5 FAQ

Q: Can I use these refills on regular paper?

A: Yes, you can use them on regular paper, but the disappearing effect works best on the specialized coating found in practice copybooks.

Q: Is the ink safe if a child accidentally ingests a small amount?

A: The ink is made from non-toxic materials safe for children's use, but it is not intended for consumption. Please consult a doctor if ingestion occurs.

Q: What happens if the ink doesn't fade?

A: Fading speed depends on temperature and humidity. If it doesn't fade, try placing the paper in a warmer environment or ensure you are using genuine refills.

Q: Do these refills work with standard ballpoint pens?

A: No, these are specifically designed for auto-disappearing groove practice pens and may not fit or function correctly in standard ballpoint pens.

Q: How long does it take for the ink to completely disappear?

A: Under normal room temperature conditions, the ink typically begins to fade after 10 minutes and disappears completely within 30 to 60 minutes.

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