Skip to main content
Home / Fountain Pens / Universal Student Ink Cartridges, 200-Pack for Calligraphy Practice, Replaceable 3.4mm Ink Refills for Elementary School 3rd Grade, Blue-Black Carbon Ink

Attributes

Brand -
Category Stationery, Educational Electronics & Office Supplies / Fountain Pens
Origin -
Ink Color Blue-Black Carbon
Pack Size 200 Cartridges
Nib Compatibility 3.4mm Standard International
Target Grade Level Elementary School (Grade 3+)
Ink Type Water-based, Non-toxic
Primary Use Calligraphy Practice & Daily Writing
Cartridge Material Durable Plastic with Seal Cap
Flow Consistency Smooth, Clog-Resistant Formula
Brand Series Hemu Student Essentials
Country of Origin China

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect for my third grader

These cartridges fit our school fountain pens perfectly. The blue-black color is exactly what the teachers require, and the ink flows smoothly without blotting. Great value for a 200-pack.

A

Anonymous

Mar 19, 2026

Rating: 4/5

Good quality, great price

Bought these for calligraphy practice sessions. The ink density is consistent, though occasionally one cartridge in a batch feels slightly lighter. Overall, an excellent bulk buy for students.

A

Anonymous

Mar 15, 2026

Rating: 5/5

Standard fit works well

The 3.4mm size is truly universal for our collection of student pens. The carbon ink dries quickly on standard notebook paper, which helps prevent smudging for left-handed writers.

A

Anonymous

Mar 11, 2026

Rating: 5/5

No more leaks!

My son used to struggle with leaking refills from other brands. These Hemu cartridges seal tightly and have never leaked in his pencil case. Highly recommend for elementary users.

A

Anonymous

Mar 11, 2026

Rating: 4/5

Solid choice for schools

Purchased for our homeschool co-op. The color is a nice traditional blue-black, not too dark but very legible. One star off only because the packaging was slightly crushed upon arrival, but the cartridges were fine.

A

Anonymous

Mar 07, 2026

Rating: 5/5

Lasts all semester

With 200 cartridges, this pack easily lasts two kids through the entire school year. The ink doesn't fade on the page, making it perfect for keeping neat notebooks.

5 FAQ

Q: Do these fit Parker-style pens?

A: These cartridges are designed for the 3.4mm Standard International size. They fit most European-style student fountain pens but may not fit proprietary Parker converters or cartridges without an adapter.

Q: Is this ink safe for young children?

A: Yes, the ink is certified non-toxic and safe for use by elementary school children. However, as with all writing instruments, it is intended for writing on paper and should not be ingested.

Q: Can I use these in a pen with a converter?

A: Yes, if your fountain pen accepts standard 3.4mm international cartridges, you can insert these directly. If your pen only uses a converter, you would need to empty the cartridge into the converter, which is not recommended due to mess.

Q: Is the ink washable if it gets on clothes?

A: While the ink is non-toxic and water-based, it is formulated as 'carbon ink' for permanence on paper. We recommend treating stains immediately with cold water, but complete removal from fabric is not guaranteed.

Q: What is the expiration date on these?

A: Our ink cartridges typically have a shelf life of 3 years from the manufacturing date when stored in a cool, dry place away from direct sunlight. Please check the batch code on the box for specific details.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Custom Solid Wood Plaque, Antique-Style Wooden Sign with Engraving, Shop Signboard, Couplet, Carved Wood Plaque

Custom Solid Wood Plaque, Antique-Style Wooden Sign with Engraving, Shop Signboard, Couplet, Carved Wood Plaque

$17.00

No-Drill Over-Toilet Storage Rack for Bathroom Wall Gap Behind Tank

No-Drill Over-Toilet Storage Rack for Bathroom Wall Gap Behind Tank

$24.55

Upgraded Breakfast Food Warmer Display Cabinet - For Fried Chicken, Pies, Roasted Meat, with Crisp Preservation and Constant Temperature Control

Upgraded Breakfast Food Warmer Display Cabinet - For Fried Chicken, Pies, Roasted Meat, with Crisp Preservation and Constant Temperature Control

$4,920.00

Butterfly Silicone Mold for Handmade Soap, Fondant, Chocolate, and Ice Cream

Butterfly Silicone Mold for Handmade Soap, Fondant, Chocolate, and Ice Cream

$14.00

Professional Music Services: Harmony Arrangement, Vocal Recording, Sheet Music, Mixing & Campus Orchestration

Professional Music Services: Harmony Arrangement, Vocal Recording, Sheet Music, Mixing & Campus Orchestration

$20.00

Chunfei Grocery Store Yunan GR02 Gravel Bike Thru-Axle Disc Brake Light Load V Travel Many Rack Mounts

Chunfei Grocery Store Yunan GR02 Gravel Bike Thru-Axle Disc Brake Light Load V Travel Many Rack Mounts

$6,445.00

Pad Printing Silicone Head Mold with Blister Cover, Long Crystal Mold for Pad Printing Machines [Long Strip]

Pad Printing Silicone Head Mold with Blister Cover, Long Crystal Mold for Pad Printing Machines [Long Strip]

$5.00

Remote-Controlled Automatic Fog Cannon for Xinjiang and Inner Mongolia Mines - Explosion-Proof, Anti-Freeze, Noise-Reducing Dust Suppression Sprayer for Coal Yards

Remote-Controlled Automatic Fog Cannon for Xinjiang and Inner Mongolia Mines - Explosion-Proof, Anti-Freeze, Noise-Reducing Dust Suppression Sprayer for Coal Yards

$6,000.00

UV Glue for Bonding PET to Melamine Board, PC to Melamine Veneer, Invisible Adhesive for Glass Sliding Doors with UV Curing

UV Glue for Bonding PET to Melamine Board, PC to Melamine Veneer, Invisible Adhesive for Glass Sliding Doors with UV Curing

$326.00

Mobile Welding Fume Purifier, Industrial Soldering Smoke Extractor, Welding Fume Collector and Exhaust Machine

Mobile Welding Fume Purifier, Industrial Soldering Smoke Extractor, Welding Fume Collector and Exhaust Machine

$2,760.00

Upgraded Commercial Constant-Temperature Heated Display Cabinet for Fried Chicken, Meat Pies, and Breakfast Pastries

Upgraded Commercial Constant-Temperature Heated Display Cabinet for Fried Chicken, Meat Pies, and Breakfast Pastries

$5,510.00

2025 New Waterproof Swim Bag with Dry-Wet Separation - Lightweight Gym and Beach Tote for Men and Women

2025 New Waterproof Swim Bag with Dry-Wet Separation - Lightweight Gym and Beach Tote for Men and Women

$14.80

4-Piece Canvas Stretching Tool Set with Wide-Jaw Pliers, Manual Staple Gun, and Starter Tool for Oil Painting Frames, Includes Tutorial

4-Piece Canvas Stretching Tool Set with Wide-Jaw Pliers, Manual Staple Gun, and Starter Tool for Oil Painting Frames, Includes Tutorial

$10.20

Construction Anti-crack Steel Wire Mesh 4mm for Concrete Floors - Thickened Galvanized Iron Grid

Construction Anti-crack Steel Wire Mesh 4mm for Concrete Floors - Thickened Galvanized Iron Grid

$10.59

Japanese Dopamine Style Portable Retainer Case with Mirror - Storage Box for Invisible Aligners and Dentures

Japanese Dopamine Style Portable Retainer Case with Mirror - Storage Box for Invisible Aligners and Dentures

$16.00

Traditional Rattle Drum Toy for Infants - Old-Style Handheld Bell, Wave Shaker, and Sand Hammer for Newborns Aged 0-1 Year; Suitable for Boys and Girls

Traditional Rattle Drum Toy for Infants - Old-Style Handheld Bell, Wave Shaker, and Sand Hammer for Newborns Aged 0-1 Year; Suitable for Boys and Girls

$6.90

Low-Temperature Plasma Oil Fume Purifier Electrostatic Ion Module Equipment Rubber Plastic Smoke Treatment Device

Low-Temperature Plasma Oil Fume Purifier Electrostatic Ion Module Equipment Rubber Plastic Smoke Treatment Device

$1,600.00

Chunfei Grocery Store - Yun'an GR02 Gravel Bike, Thru-Axle, Disc Brake, Lightweight Touring with Multiple Rack Mounts

Chunfei Grocery Store - Yun'an GR02 Gravel Bike, Thru-Axle, Disc Brake, Lightweight Touring with Multiple Rack Mounts

$7,977.00

Cashmir Blending Knife Replacement Head Set, Sketch Neony Blending Heads, Sponge Blending Heads, Breathing Cotton for Art Students

Cashmir Blending Knife Replacement Head Set, Sketch Neony Blending Heads, Sponge Blending Heads, Breathing Cotton for Art Students

$4.34

Natural Amethyst, Rose Quartz, Clear Quartz, and Lemon Quartz Double-Pointed Tumbled Beads for DIY Bracelets, Necklaces, and Earrings

Natural Amethyst, Rose Quartz, Clear Quartz, and Lemon Quartz Double-Pointed Tumbled Beads for DIY Bracelets, Necklaces, and Earrings

$1.70

Accordion-Style Watercolor Sketchbook, 32k Foldable Blank Paper, 300g Cotton Pulp Fine Texture for Painting, A4 Stamp Collection Travel Journal, DIY Sticker Art Notebook

Accordion-Style Watercolor Sketchbook, 32k Foldable Blank Paper, 300g Cotton Pulp Fine Texture for Painting, A4 Stamp Collection Travel Journal, DIY Sticker Art Notebook

$9.70

Electric Watercolor Spray Pen Children Hand-painted Color Pa

Electric Watercolor Spray Pen Children Hand-painted Color Pa

$52.55

ABB VFD ACS355-01E-09A8-2, Brand New Original 2.2KW/9.8A, Single Phase 220V

ABB VFD ACS355-01E-09A8-2, Brand New Original 2.2KW/9.8A, Single Phase 220V

$1,919.00

Printmaking Press Machine - Large Format Etching and Woodblock Printer for School Art Classes and Clubs

Printmaking Press Machine - Large Format Etching and Woodblock Printer for School Art Classes and Clubs

$583.11

Bread Rattle Superman Maraca Baby 0-1 Year Soothing Tool Newborn Safe to Chew Grip Training Hand Rattle

Bread Rattle Superman Maraca Baby 0-1 Year Soothing Tool Newborn Safe to Chew Grip Training Hand Rattle

$8.80

Direct Supply 0.75kw Laboratory Frame Mixer - Suitable for Mixing Fluid Materials, Adhesives, and Lithium Battery Applications

Direct Supply 0.75kw Laboratory Frame Mixer - Suitable for Mixing Fluid Materials, Adhesives, and Lithium Battery Applications

$2,395.00

Yonghe Hair Transplant Follicle Detection and Scalp Health Assessment - Consultation and Photodynamic Therapy Experience

Yonghe Hair Transplant Follicle Detection and Scalp Health Assessment - Consultation and Photodynamic Therapy Experience

$0.10

Continental CSC5 Tires – Sizes 215/225/235/245/255 x 40/45/50/55 R17/18/19/20/21

Continental CSC5 Tires – Sizes 215/225/235/245/255 x 40/45/50/55 R17/18/19/20/21

$725.00

Commercial High-Speed Fruit and Vegetable Crusher and Puree Maker, Continuous Processing Equipment for Galangal, Fresh Ginger, Bell Peppers, and Tomatoes

Commercial High-Speed Fruit and Vegetable Crusher and Puree Maker, Continuous Processing Equipment for Galangal, Fresh Ginger, Bell Peppers, and Tomatoes

$17,980.00

DIY Scented Candle Molds - 24 Popular Korean Acrylic PC Styles: Cylinder, Pointed Top, Flat Top, Square, Shell

DIY Scented Candle Molds - 24 Popular Korean Acrylic PC Styles: Cylinder, Pointed Top, Flat Top, Square, Shell

$10.80