Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	Schuman
Product Type	Dyne Test Pen
Available Dyne Levels	28, 30, 32, 34, 36, 38, 40, 42, 44, 72 mN/m
Application Method	Brush Tip Application
Primary Use	Surface Energy Testing
Target Materials	Plastics, Films, Foils, and Coatings
Packaging	Individual Sealed Bottle
Origin	Authorized UK Distributor
Shelf Life	12 Months from Manufacture
Safety Warning	Flammable Liquid, Keep Away from Heat

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Accurate and durable

Been using Schuman pens for years. This batch from the UK distributor is genuine and performs perfectly. Critical for ensuring our adhesive bonds correctly to polyethylene surfaces.

Anonymous

Mar 23, 2026

Rating: 4/5

Good quality, fast shipping

Ordered the 38 and 40 dyne pens for our production line. They arrived quickly and work as expected. Only giving 4 stars because the cap can be a bit tight to remove with gloves on.

Anonymous

Mar 22, 2026

Rating: 5/5

Essential for our QC lab

We use these pens daily to test surface tension on packaging films before printing. The brush tip applies a consistent line, and the results are reliable every time. Great value for an authorized product.

Anonymous

Mar 07, 2026

Rating: 5/5

Reliable standard for our team

Our entire quality control team relies on these specific dyne levels. The 36 to 44 range covers most of our plastic substrate needs. No issues with drying out prematurely.

Anonymous

Mar 06, 2026

Rating: 3/5

Works well but pricey

The pens function correctly and give clear results, but they are slightly more expensive than other brands. However, knowing it is an authorized distributor gives peace of mind regarding authenticity.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for corona treatment checks

Exactly what we needed to verify our corona treater settings. The fluid spreads evenly when the surface energy is sufficient and beads up when it is not. Highly recommended.

5 FAQ

Q: Can I return the pens if I ordered the wrong dyne levels?

A: Due to safety regulations regarding flammable liquids, we cannot accept returns on opened dyne pens. If the package is unopened and in original condition, please contact our customer service within 14 days to arrange an exchange.

Q: What is the difference between the 38 and 40 dyne pens?

A: The number indicates the surface energy level in millinewtons per meter (mN/m). You select the pen that matches the required surface tension for your specific printing or bonding process. If the liquid beads up, the surface energy is lower than the pen's rating.

Q: Does this product come with a calibration certificate?

A: As an authorized distributor, our Schuman pens are manufactured to strict standards. While individual pens do not typically come with a unique calibration certificate, the batch meets ISO-compliant manufacturing specifications for dyne test fluids.

Q: How should these pens be stored to maintain shelf life?

A: Store the pens upright in a cool, dry place away from direct sunlight and heat sources. Ensure the cap is tightly sealed immediately after use to prevent the test fluid from evaporating or absorbing moisture.

Q: Are these pens suitable for testing metal surfaces?

A: While primarily designed for plastics, films, and foils, they can technically be used on coated metals. However, bare metals usually have very high surface energy, so lower dyne level pens may always spread, making them less useful for differentiation on untreated metal.

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