Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Brand	Deli
Ink Color	Pure Blue, Black, Blue-Black, Light Blue
Cartridge Diameter	3.4mm Universal
Target Audience	Elementary School Students (Grade 4+)
Special Feature	Quick-Drying Formula
Functionality	Posture Correction Aid
Erasable	Yes (Specific Erasable Variants)
Package Contents	Replaceable Ink Cartridges
Usage	Calligraphy Practice and Daily Writing
Compatibility	Fits Most Standard Fountain Pens

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

No more stained fingers

The quick-drying claim is accurate. My child used to come home with blue stains on his fingers, but not anymore since switching to these.

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for my son's homework

These cartridges fit perfectly in my son's school fountain pen. The blue ink is vibrant but not too messy, and it dries quickly so there are no smudges on his left hand.

Anonymous

Mar 19, 2026

Rating: 4/5

Good value for bulk buying

Bought these for our classroom. They work well with standard pens. The quick-drying feature is a lifesaver during timed writing exercises.

Anonymous

Mar 13, 2026

Rating: 5/5

Smooth flow

The ink flows very smoothly without skipping. My daughter finds it easier to control her handwriting with these compared to the previous brand we used.

Anonymous

Mar 11, 2026

Rating: 4/5

Easy to replace

My 4th grader can change these cartridges himself without making a mess. The universal size fits his Deli pen perfectly.

Anonymous

Mar 05, 2026

Rating: 5/5

Great for calligraphy practice

We use these for weekend calligraphy practice. The consistency of the ink helps maintain even strokes, which is great for beginners learning proper posture.

5 FAQ

Q: Does this ink clog pens if left unused for a week?

A: Our quick-drying formula is designed to minimize clogging. However, for any fountain pen, it is best to cap it tightly when not in use. If storing for longer periods, flushing the pen is recommended.

Q: Is this safe for a 7-year-old to handle?

A: Yes, these cartridges are designed for elementary students. They are easy to grip and replace. As with any small item, adult supervision is suggested for younger children during the first few changes.

Q: Is the light blue color erasable?

A: Only the specific cartridges labeled as 'Erasable' in the product title have that feature. Please ensure you select the erasable variant if that function is required for your student's needs.

Q: How many cartridges come in one pack?

A: The quantity varies by seller option. Please check the specific package size selected at checkout, as we offer packs ranging from 10 to 50 cartridges.

Q: Are these cartridges compatible with Lamy Safari pens?

A: These are 3.4mm universal cartridges. While they fit many standard European pens, Lamy Safari typically uses a proprietary cartridge shape. We recommend checking your specific pen model compatibility before purchasing.

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