Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	TestPro Instruments
Product Type	Surface Tension Test Pen
Dyne Level Range	30 - 72 mN/m
Tip Material	High-Density Polyethylene
Ink Color	Blue
Pack Size	Single Unit
Shelf Life	12 Months from Manufacture
Storage Temperature	5°C to 25°C
Application Surface	Plastic, Metal, Glass, Foil
Country of Origin	Germany

6 reviews

Anonymous

Mar 23, 2026

Rating: 5/5

Accurate and durable

I have been using Dyne pens for years, and this brand holds up well. The markings are clear, making it easy to determine the exact dyne level of the substrate.

Anonymous

Mar 23, 2026

Rating: 3/5

Decent but cap fits loosely

The testing fluid works as expected, but the cap on my unit felt a bit loose, which worries me about long-term storage without evaporation.

Anonymous

Mar 13, 2026

Rating: 5/5

Essential for our quality control lab

We use these pens daily to verify surface energy on packaging films before printing. The ink flow is consistent, and the results are reliable compared to our liquid test kits.

Anonymous

Mar 11, 2026

Rating: 5/5

Standard industry tool

Exactly what we needed for our ISO compliance checks. Easy to use, no mess, and provides immediate visual feedback on surface cleanliness.

Anonymous

Mar 07, 2026

Rating: 4/5

Good value, fast drying

Works well for quick checks on corona-treated polyethylene. The only minor issue is that the tip can dry out if left uncapped for more than a minute, so be careful.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for adhesive testing

Our team uses these to ensure surfaces are clean enough for high-strength adhesives. It saves us time and prevents bond failures in production.

5 FAQ

Q: Can this pen be used on curved surfaces?

A: Yes, the flexible tip allows for application on slightly curved surfaces, though flat surfaces provide the most accurate and readable results.

Q: What is the shelf life once the pen is opened?

A: Once opened, the pen should be used within 6 months if stored properly with the cap tightly sealed. Unopened pens have a 12-month shelf life.

Q: How do I know which dyne level pen to purchase for my specific plastic?

A: You should select a pen with a dyne level slightly higher than the required surface energy for your adhesive or ink. We recommend testing with a range pack first to identify your baseline.

Q: Do you offer bulk discounts for laboratory purchases?

A: Yes, we offer tiered pricing for orders of 10 units or more. Please contact our sales department directly for a custom quote.

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 direct skin contact should be avoided. Please refer to the SDS sheet for full safety details.

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