Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / 记号笔/粗笔
Origin	-
Brand	Yi Zhi Bi
Model Number	YB-4001
Ink Type	Oil-Based Permanent
Tip Size	Large (Approx. 2.0mm - 3.0mm)
Available Colors	Black, Red, Blue
Body Material	Durable Plastic with Clip
Surface Compatibility	Paper, Cardboard, Metal, Glass, Plastic
Odor Level	Low Odor Formula
Cap Type	Snap-on with Airtight Seal
Package Contents	1 Marker Pen per unit

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Writes on everything!

I tested this on glass, plastic, and metal, and it worked perfectly on all surfaces. The permanent nature of the ink means my labels stay put even in humid conditions.

Anonymous

Mar 27, 2026

Rating: 5/5

Consistent quality

I buy these in bulk for my art studio. The Yi Zhi Bi brand never disappoints. The oil-based formula doesn't bleed through thick paper as much as water-based ones do.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for warehouse labeling

These markers are incredibly reliable. The ink flows smoothly and dries quickly on cardboard boxes. I've been using the black version for our shipping department for months without any issues.

Anonymous

Mar 19, 2026

Rating: 3/5

Good but strong smell initially

The marker works well and the line is very dark, but there was a noticeable chemical smell when I first opened it. It dissipated after a few minutes of use in a ventilated room.

Anonymous

Mar 14, 2026

Rating: 4/5

Great value, bold lines

The tip is quite large, which is exactly what I needed for making signs. The red color is very vibrant. Only giving 4 stars because the cap can be a bit tight to remove sometimes.

Anonymous

Mar 02, 2026

Rating: 5/5

Best outline pen for projects

Using the blue one for outlining sketches on poster board. The flow is consistent from start to finish, and it hasn't dried out even though I left the cap off briefly once.

5 FAQ

Q: Do you sell refills for this specific marker model?

A: No, the Yi Zhi Bi YB-4001 is designed as a disposable unit. Once the ink is depleted, the entire pen should be recycled according to your local regulations.

Q: Is this marker safe to use on food packaging?

A: While the ink is permanent and non-toxic once dry, we do not recommend direct contact with food. It is suitable for labeling the exterior of food containers but should not be used on surfaces that touch edible items directly.

Q: What is the exact tip diameter in millimeters?

A: The YB-4001 model features a large bullet tip that typically produces a line width between 2.0mm and 3.0mm, depending on the pressure applied during writing.

Q: How long does the ink last if the cap is left off accidentally?

A: If left uncapped, the tip may begin to dry out within 24 to 48 hours. However, the airtight seal on the cap helps preserve the ink life significantly when stored properly.

Q: Can the ink be removed from glass surfaces?

A: Since this is an oil-based permanent marker, it adheres strongly to glass. It can usually be removed using rubbing alcohol, acetone, or a specialized glass cleaner with some scrubbing.

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