Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	Cuiyuan
Model Series	CY Dyne Pen
Available Sizes	30, 32, 34, 36, 38, 40, 42 mN/m
Total Test Range	18 - 72 mN/m
Application Method	Direct Stroke Test
Primary Use	Surface Tension Measurement
Compatible Materials	Plastic, Film, Foil, Glass
Liquid Type	Calibrated Formamide-Based Solution
Packaging	Individual Sealed Tube
Origin	Domestic Manufacturing

6 reviews

Anonymous

Mar 27, 2026

Rating: 4/5

Solid performance

Works as expected. The stroke is smooth and the wetting behavior is clear to see. Deducting one star only because shipping took longer than anticipated.

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect for small batch testing

As a small converter, I don't need expensive electronic testers. These pens give me exactly the data I need to ensure ink adhesion without breaking the bank.

Anonymous

Mar 15, 2026

Rating: 5/5

Essential for our packaging line

We use these pens daily to check the corona treatment on our polyethylene films. The results are consistent and match our lab equipment perfectly. Great value for the price.

Anonymous

Mar 14, 2026

Rating: 5/5

Reliable quality control tool

Purchased the full set from 30 to 42. They are very reliable for determining if our printing surfaces are ready. No issues with false positives so far.

Anonymous

Mar 07, 2026

Rating: 5/5

Standard industry tool

These are the standard dyne pens we have used for years. The Cuiyuan brand holds up well against international competitors at a better price point.

Anonymous

Mar 02, 2026

Rating: 4/5

Good accuracy, fast drying

The ink dries quickly which helps in getting immediate results on the production floor. I wish the cap sealed a bit tighter to prevent evaporation during long storage.

5 FAQ

Q: How should I store these pens to maximize their lifespan?

A: Store them horizontally in a cool, dry place away from direct sunlight and heat sources. Keeping them at room temperature (around 20-25°C) is ideal.

Q: What is the difference between size 38 and size 40?

A: The number indicates the surface tension level in mN/m (dynes/cm). Size 38 tests for 38 mN/m, while size 40 tests for 40 mN/m. You choose the size based on your required adhesion threshold.

Q: Can these pens be used on metal surfaces?

A: While primarily designed for plastics and films, they can technically be used on clean metal surfaces to measure surface energy, though results may vary depending on oxidation or coatings.

Q: How long does the test liquid last once the tube is opened?

A: For best accuracy, we recommend using the pen within 3 to 6 months after opening. Always ensure the cap is tightly sealed immediately after use to prevent evaporation.

Q: Is there a certificate of calibration included?

A: Yes, each batch comes with a general quality conformity statement. For specific ISO-certified calibration documents, please contact our support team with your order number.

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