Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	ARCOTEST
Origin	Germany
Dyne Level	38 mN/m
Application	Surface Tension Testing
Target Materials	Plastic, Film, Foil
Tip Type	Felt Marker
Ink Color	Blue
Shelf Life	12 Months
Storage Temp	5°C to 25°C
Package Includes	1 Test Pen

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Essential for quality control

This pen is incredibly accurate for checking surface tension on our packaging films. The 38 dyne level is exactly what we needed for our polyethylene substrates.

Anonymous

Mar 27, 2026

Rating: 4/5

Standard industry tool

Does the job well. The felt tip is durable and the markings are easy to see against most clear films. Would recommend for any print shop.

Anonymous

Mar 25, 2026

Rating: 4/5

Good product, fast shipping

Works as expected for our printing prep. The ink flow is consistent, though I wish the cap sealed a bit tighter to prevent drying out between uses.

Anonymous

Mar 22, 2026

Rating: 5/5

Reliable German engineering

We have used ARCOTEST pens for years in our lab. This specific 38 dyne pen gives clear, readable results every time without smudging.

Anonymous

Mar 13, 2026

Rating: 5/5

Accurate and consistent

Very satisfied with the performance. It beads up or spreads exactly as predicted by the dyne level, making troubleshooting easy.

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for adhesion testing

Helps us determine if our coatings will adhere properly before full production runs. Saves us a lot of wasted material and time.

5 FAQ

Q: What happens if the liquid beads up instead of spreading?

A: If the liquid beads up within 2 seconds, the surface tension of the material is lower than 38 mN/m, indicating that further treatment like corona discharge may be required for proper adhesion.

Q: Do you offer dyne pens in levels other than 38?

A: Yes, we stock a full range of ARCOTEST pens from 18 to 72 mN/m. Please contact us or search our store for the specific dyne level your application requires.

Q: Can this pen be used on metal surfaces?

A: While primarily designed for plastics and films, it can be used on treated metal surfaces to check cleanliness or coating readiness, provided the surface energy falls within the test range.

Q: How long does the ink last once the pen is opened?

A: If the cap is secured tightly immediately after each use, the pen typically remains effective for 6 to 9 months. Improper sealing may cause it to dry out sooner.

Q: Is the ink toxic or hazardous?

A: The ink contains formamide and other solvents. It should be used in a well-ventilated area and kept away from eyes and skin. Please refer to the SDS sheet for detailed safety information.

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