Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Flat Brushes |
| Origin | - |
| Brand | Cuiyuan CY |
| Model Number | No. 38 |
| Surface Tension Level | 38 dyne/cm |
| Ink Color | Red |
| Application Type | Surface Tension Testing |
| Compatible Surfaces | Plastic, Film, Metal, Glass |
| Pen Tip Material | Felt |
| Country of Origin | China |
| Package Contents | 1 Dyne Pen |
| Shelf Life | 12 Months (Unopened) |
Anonymous
Mar 30, 2026
Rating: 5/5
Reliable domestic brand
I have switched from imported brands to this Cuiyuan CY pen, and the results are identical. It accurately identifies if the surface energy meets the 38 dyne requirement for our adhesive applications.
Anonymous
Mar 20, 2026
Rating: 4/5
Solid performance
Does exactly what a dyne pen should do. We tested it against our calibrated equipment and it was accurate. Just remember to keep the cap tight when not in use to prevent drying.
Anonymous
Mar 19, 2026
Rating: 5/5
Great for printing prep
We use this to ensure our substrates are ready for flexographic printing. The No. 38 level is critical for our ink adhesion, and this pen never fails us. Will buy again.
Anonymous
Mar 18, 2026
Rating: 5/5
Perfect for our quality control line
We use these pens daily to test the corona treatment on our packaging films. The No. 38 rating is consistent, and the red ink provides excellent contrast against clear plastics. Highly recommended for industrial use.
Anonymous
Mar 10, 2026
Rating: 4/5
Good value for money
Works as expected for surface tension testing. The ink flow is smooth. I deducted one star only because the cap feels slightly loose, but it hasn't affected the performance yet.
Anonymous
Mar 09, 2026
Rating: 5/5
Clear and precise
The red color makes it very easy to see where the ink beads up or spreads out. Essential tool for our lab technicians. Delivery was fast too.
Q: Do you offer bulk discounts for orders over 50 units?
A: Yes, we offer tiered pricing for bulk orders. Please contact our sales team directly through the 'Contact Seller' button on our store page to request a quote for large quantities.
Q: How long does the ink last once the bottle is opened?
A: Once opened, the pen typically remains effective for about 3 to 6 months if the cap is sealed tightly immediately after each use. Exposure to air can cause the solvent to evaporate, altering the dyne level.
Q: Is the ink toxic?
A: The ink contains solvents typical for dyne tests. It should be used in a well-ventilated area. Please refer to the Safety Data Sheet (SDS) included with the product for specific handling instructions.
Q: What happens if the ink beads up instead of spreading?
A: If the ink beads up within 2 seconds, it indicates that the surface tension of the material is lower than 38 dyne/cm. You would need to increase the corona treatment or clean the surface further.
Q: Can this pen be used on metal surfaces?
A: Yes, the No. 38 Dyne Pen can be used on metal surfaces to test for cleanliness and oxidation levels before painting or bonding, although it is most commonly used on polymers and films.
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