Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Flat Brushes
Origin	-
Brand	Cuiyuan
Model Series	CY Dyne Pen
Available Surface Tensions	32, 38, 40, 42, 44 dynes/cm
Primary Application	Surface energy testing for printing and adhesion
Detection Target	Oil, grease, and corona treatment levels
Tip Material	High-density felt nib
Ink Type	Formamide-based test solution
Packaging	Individual plastic case with cap
Shelf Life	12 months from manufacture date
Country of Origin	China

6 reviews

Anonymous

Mar 29, 2026

Rating: 4/5

Does the job

Simple and effective tool for detecting grease and oil contamination. Instructions could be more detailed, but if you know how dyne pens work, these are great.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable adhesion testing

Perfect for verifying corona treatment effectiveness on packaging materials. The distinction between wetting and beading is very clear with these pens.

Anonymous

Mar 16, 2026

Rating: 5/5

Essential for our print shop

We use these daily to check surface tension on plastic films before printing. The 38 and 42 dyne pens are our most used. They provide consistent results and help us avoid adhesion failures.

Anonymous

Mar 09, 2026

Rating: 5/5

Accurate and durable

I've been using Cuiyuan pens for years. This batch is just as good as previous ones. The felt tips hold up well even after hundreds of tests.

Anonymous

Mar 07, 2026

Rating: 5/5

Great for QC department

We bought the full set of tensions (32-44). Having the range allows us to pinpoint the exact surface energy of various substrates. Highly recommended for manufacturing QA.

Anonymous

Mar 01, 2026

Rating: 4/5

Good value for money

Works as expected for quick quality control checks. The ink flows smoothly. I deducted one star because the cap can be a bit tight to remove quickly during high-volume testing.

5 FAQ

Q: Do you offer bulk discounts for purchasing multiple sets?

A: Yes, we offer tiered pricing for bulk orders. Please contact our sales team directly through the 'Contact Seller' button on our store page for a custom quote.

Q: Can these pens be used on metal surfaces?

A: Yes, these dyne pens can be used on metal, provided the surface is clean and free of heavy oils. They are commonly used to check cleaning efficacy on aluminum and steel prior to coating.

Q: Is the ink toxic?

A: The ink contains formamide and should be handled with care. Avoid contact with skin and eyes, and do not ingest. Please refer to the Safety Data Sheet (SDS) included in the package for detailed safety information.

Q: What is the difference between the 40 and 42 dyne pens?

A: The number indicates the surface tension in dynes/cm. A 42 dyne pen requires a higher surface energy to wet out than a 40 dyne pen. You select the pen based on the minimum adhesion requirement for your specific ink or glue.

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

A: Once opened, the pen should typically last 3 to 6 months depending on frequency of use. Always recap tightly immediately after use to prevent evaporation.

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