Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Flat Brushes |
| Origin | - |
| Brand | General Agent |
| Product Type | Surface Tension Test Pen |
| Origin | USA |
| Measurement Range | 32 to 72 dynes/cm |
| Available Values | 32, 34, 36, 38, 40, 42, 72 |
| Application Method | Direct Swipe |
| Primary Use | Adhesion Testing |
| Target Surfaces | Plastics, Films, Foils |
| Packaging | Individual Pen with Cap |
| Shelf Life | 12 Months Unopened |
Anonymous
Mar 10, 2026
Rating: 3/5
Works well but instructions are sparse
The pen itself works fine for testing surface tension, but I wish it came with a more detailed guide on storage temperatures. Had to look up best practices online. Product quality is solid though.
Anonymous
Mar 07, 2026
Rating: 5/5
Reliable for R&D projects
Using these for research on new polymer blends. The precision between the different dyne levels (32-72) helps us pinpoint the exact surface energy requirements for our adhesives. Excellent tool.
Anonymous
Mar 06, 2026
Rating: 5/5
Standard for our printing press
Our operators prefer the General Agent brand over others we have tried. The color contrast of the fluid makes it easy to see if the surface wets out within the two-second window.
Anonymous
Mar 04, 2026
Rating: 5/5
Essential for our quality control lab
We use these Dyne pens daily to test surface energy on polyethylene films before printing. The ACCU series provides consistent results and the ink flow is very reliable. Highly recommended for industrial settings.
Anonymous
Mar 03, 2026
Rating: 5/5
Fast shipping and genuine product
Needed specific dyne levels for a new packaging line. These USA-made pens arrived quickly and performed perfectly during our initial calibration tests. No issues with drying out yet.
Anonymous
Mar 01, 2026
Rating: 4/5
Good value, accurate readings
Bought the 38 and 42 dyne pens for checking coating adhesion. They work exactly as described. Only giving 4 stars because the cap can be a bit tight to remove sometimes, but the accuracy makes up for it.
Q: Do you sell a kit with multiple dyne levels?
A: Currently, we sell the pens individually so you can select the specific dyne levels you need. However, many customers purchase a set of common values like 38, 40, and 42 together for comprehensive testing.
Q: Is this product safe to use in a standard office environment?
A: These pens contain chemical solutions intended for industrial or laboratory use. We recommend using them in a well-ventilated area and avoiding direct skin contact or inhalation of fumes.
Q: Can this pen be used on metal surfaces?
A: While primarily designed for plastics, films, and foils, these pens can technically be used on treated metal surfaces to check for cleanliness or coating readiness, though results may vary based on surface roughness.
Q: How long does the test fluid last once the pen is opened?
A: Once opened, the pen should typically last for several months if the cap is tightly secured immediately after each use to prevent evaporation. We recommend storing it in a cool, dry place.
Q: What is the difference between the 38 and 40 dyne pens?
A: The number indicates the surface tension level in dynes per centimeter that the fluid is calibrated to. A 40 dyne pen will bead up on a surface with less than 40 dynes/cm energy, while a 38 dyne pen tests for a slightly lower threshold.
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