Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Flat Brushes |
| Origin | - |
| Brand | Sheelon |
| Origin | Germany |
| Available Dyne Levels | 30, 32, 34, 36, 38, 40 mN/m |
| Application Method | Brush-on Liquid Test |
| Primary Use | Corona Treatment Verification |
| Suitable Substrates | Plastic Films, Foils, and Coatings |
| Liquid Color | Red |
| Bottle Material | High-Density Polyethylene (HDPE) |
| Shelf Life | 12 Months Unopened |
| Storage Temperature | 5°C to 25°C |
Anonymous
Mar 27, 2026
Rating: 4/5
Solid product
Does the job well. The liquid doesn't evaporate quickly even if left open for a few seconds during testing. Would recommend for industrial use.
Anonymous
Mar 10, 2026
Rating: 4/5
Good quality, fast shipping
The pen works exactly as described. I deducted one star only because the cap can be a bit tight to remove with gloves on, but the liquid quality is excellent.
Anonymous
Mar 06, 2026
Rating: 5/5
Essential for our packaging line
We use these pens daily to check surface tension on our polyethylene films. The results are consistent and the brush tip holds up well over time.
Anonymous
Mar 06, 2026
Rating: 5/5
Accurate and durable
We have been using Sheelon pens for years. This latest batch maintains the high accuracy we expect. Great for verifying treatment levels before printing.
Anonymous
Mar 03, 2026
Rating: 5/5
Reliable German engineering
Switched from a cheaper brand and the difference in consistency is noticeable. The wetting behavior is very clear, making it easy to train new staff.
Anonymous
Mar 01, 2026
Rating: 5/5
Perfect for QA testing
Our quality assurance team relies on these for batch testing. The 38 dyne level is our standard, and this pen gives us confidence in our corona treater settings.
Q: Is the liquid toxic?
A: The liquid contains formamide and other solvents. It should be handled with care, avoiding eye contact and ingestion. Please refer to the Safety Data Sheet (SDS) included with the product for full details.
Q: Do you sell a kit with all dyne levels from 30 to 40?
A: Yes, we offer a complete test kit containing individual pens for 30, 32, 34, 36, 38, and 40 mN/m levels. You can find it listed under the 'Test Kits' category on our store.
Q: What happens if the liquid beads up instead of spreading?
A: If the liquid beads up within 2 seconds, it indicates that the surface tension of the substrate is lower than the dyne level of the pen. You should try a pen with a lower dyne value to find the correct match.
Q: How long does the liquid last once the bottle is opened?
A: Once opened, we recommend using the pen within 6 months for optimal accuracy, provided the cap is tightly sealed after each use and stored at room temperature.
Q: Can this pen be used on metal surfaces?
A: These pens are specifically designed for non-porous plastic films and coatings. They are not intended for use on metal surfaces as the surface energy dynamics differ significantly.
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