Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	Sheelon
Product Type	Dyne Test Pen
Available Levels	32, 34, 36 mN/m
Application Method	Direct Surface Wipe
Primary Use	Surface Tension Testing
Target Materials	Plastic, Film, Foil
Packaging	Individual Sealed Tube
Shelf Life	12 Months Unopened
Storage Condition	Cool and Dry Place
Country of Origin	China

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Perfect for QC department

Simple, effective, and affordable. We keep a stock of 32, 34, and 36 dyne pens on the production floor. Helps us catch surface treatment issues before they become defects.

Anonymous

Mar 26, 2026

Rating: 4/5

Good value for money

Works as expected for quick quality control checks. The ink dries relatively fast, so you need to observe the bead-up immediately. Would recommend buying a set of different levels.

Anonymous

Mar 24, 2026

Rating: 3/5

Decent but cap can be tight

The testing fluid works fine, but sometimes the cap is very hard to remove, which slows down the workflow. Otherwise, the measurement seems accurate compared to our lab equipment.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable testing tool

Been using Sheelon pens for years. They are accurate and the tips hold up well even with frequent use. Great for ensuring adhesion before applying labels or inks.

Anonymous

Mar 10, 2026

Rating: 5/5

Essential for our printing line

We use these pens daily to check the corona treatment on our packaging films. The 34 dyne level is perfect for our current setup. Results are consistent and easy to read.

Anonymous

Mar 05, 2026

Rating: 4/5

Standard industry tool

Does exactly what a dyne pen should do. The liquid spreads clearly on treated surfaces and beads up on untreated ones. Shipping was fast and packaging was secure.

5 FAQ

Q: Can this pen be used on metal surfaces?

A: These pens are primarily designed for non-porous polymer surfaces like plastic films and foils. While they can technically be applied to metal, the results may not correlate standardly with plastic surface tension metrics.

Q: What is the difference between the 32, 34, and 36 levels?

A: The number represents the surface tension in mN/m (milli-Newtons per meter). You select the level that matches your required adhesion threshold. If the liquid beads up, the surface tension is lower than the pen value; if it wets the surface, it is higher.

Q: Is the ink toxic or hazardous?

A: The fluid contains formamide and other solvents. It should be used in a well-ventilated area. Please refer to the Safety Data Sheet (SDS) included with the product for detailed handling and disposal instructions.

Q: Do you offer bulk discounts for purchasing a full set?

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 discuss volume pricing for multiple units or mixed level sets.

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

A: Once opened, the pen should typically last for several months if the cap is tightly sealed after every use to prevent evaporation. For best accuracy, replace if the fluid volume drops significantly or results become inconsistent.

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