Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Flat Brushes |
| Origin | - |
| Brand | Letianqi |
| Product Type | Dyne Test Pen |
| Application | Surface Tension Testing |
| Target Materials | Plastic, Film, Foil, Paper |
| Pack Size | Single Unit |
| Ink Color | Blue |
| Shelf Life | 12 Months (Unopened) |
| Storage Temperature | 5°C to 25°C |
| Country of Origin | China |
| Item Weight | 15 grams |
Anonymous
Mar 21, 2026
Rating: 4/5
Reliable for routine checks
We keep a set of different dyne values in our lab. These pens are easy to use and the markings are clear. Delivery was also very quick.
Anonymous
Mar 15, 2026
Rating: 5/5
Accurate and fast
These Letianqi pens provide instant results. We tested them against more expensive brands and found no difference in accuracy. Great for our packaging department.
Anonymous
Mar 13, 2026
Rating: 3/5
Decent but dries out if left open
The pen works well when fresh, but you must be very careful to cap it immediately after use. I left it open for a few minutes and the tip dried out faster than others I have used.
Anonymous
Mar 06, 2026
Rating: 5/5
Essential for our printing line
We use these pens daily to check the treat level on our polyethylene films before printing. The ink flow is consistent and the results are reliable. Highly recommended for quality control.
Anonymous
Mar 04, 2026
Rating: 4/5
Good value for money
Works exactly as expected for surface tension testing. The only reason I didn't give 5 stars is that the cap can be a bit tight sometimes, but the performance is solid.
Anonymous
Mar 03, 2026
Rating: 5/5
Standard industry tool
If you work in flexography or coating, you need these. This specific brand offers good consistency across batches. No complaints from our technical team.
Q: Can these pens be used on metal surfaces?
A: Dyne pens are primarily designed for non-porous polymer surfaces like plastics and films. They are generally not suitable for testing untreated metal surfaces.
Q: Do you offer a kit with multiple dyne levels?
A: Yes, we sell individual pens as well as complete sets ranging from 30 to 72 dynes/cm. Please check our store listings for bundle options.
Q: How do I know if the surface tension is sufficient?
A: If the ink bead remains intact for 2 seconds, the surface tension is lower than the pen's value. If it spreads evenly within 2 seconds, the surface tension is equal to or higher than the pen's value.
Q: Is the ink toxic or hazardous?
A: The ink contains formamide and other solvents. It should be used in a well-ventilated area and kept away from eyes and skin. Please refer to the SDS sheet for detailed safety information.
Q: What is the shelf life of these pens once opened?
A: Once opened, we recommend using the pen within 3 to 6 months for optimal accuracy, provided the cap is sealed tightly after every use.
Accordion-Style Watercolor Sketchbook, 32k Foldable Blank Paper, 300g Cotton Pulp Fine Texture for Painting, A4 Stamp Collection Travel Journal, DIY Sticker Art Notebook
$9.70
Electric Watercolor Spray Pen Children Hand-painted Color Pa
$52.55
VFD 2.2kW 9.8A Single Phase 220V
$1,919.00
Printmaking Press Machine - Large Format Etching and Woodblock Printer for School Art Classes and Clubs
$583.11
Bread Rattle Superman Maraca Baby 0-1 Year Soothing Tool Newborn Safe to Chew Grip Training Hand Rattle
$8.80
Direct Supply 0.75kw Laboratory Frame Mixer - Suitable for Mixing Fluid Materials, Adhesives, and Lithium Battery Applications
$2,395.00
Yonghe Hair Transplant Follicle Detection and Scalp Health Assessment - Consultation and Photodynamic Therapy Experience
$0.10
Continental CSC5 Tires – Sizes 215/225/235/245/255 x 40/45/50/55 R17/18/19/20/21
$725.00
Commercial High-Speed Fruit and Vegetable Crusher and Puree Maker, Continuous Processing Equipment for Galangal, Fresh Ginger, Bell Peppers, and Tomatoes
$17,980.00
DIY Scented Candle Molds - 24 Popular Korean Acrylic PC Styles: Cylinder, Pointed Top, Flat Top, Square, Shell
$10.80
Custom Solid Wood Plaque and Couplet Carving - Wooden Shop Signage, Arched Door Headers, and Grand Opening Engravings
$174.00
New Direct-Sale 326 Instant Glue - High-Strength Structural Adhesive for Metal, Heat Resistant, Anti-Aging, Ideal for Car Rearview Mirrors
$26.54
Zhong Shaojing Lingfei Jing Small Regular Script Water Writing Cloth for Calligraphy Practice - Reusable Quick-Dry Mat
$22.53
New 968 Fast-Drying Super Glue - Strong Bond for Metal, Magnets, Rubber, and Aluminum Alloy
$18.20
German Imported Stone Removal Hook Car Tire Stone Cleaning Tool Vehicle Foldable Multi-Function Stone Remover
$11.34
![[10% Off for 2 Items] Double-Sided Wool Felt Mat for Calligraphy and Painting, Student Practice Sheet, Brush Writing Desk Pad, Four Treasures of the Study Set](https://www.gosteppe.com/cache/small/product/270298/legacy-main-71bd30ba8d3367be61265f91.webp)
[10% Off for 2 Items] Double-Sided Wool Felt Mat for Calligraphy and Painting, Student Practice Sheet, Brush Writing Desk Pad, Four Treasures of the Study Set
$6.63
In Stock Special Offer: QS18VP6LLPQ8 Sensor - Price Negotiable
$600.00
Broccoli Vegetable Washing Machine for Pre-made Dishes, Water Bath Cleaning Equipment with Bubble System for Herbs and Export-Grade Produce
$615.00
Hongkedou Oxford Fabric Bag-in-Bag Divider Insert, Stiff Makeup Organizer with Zipper, Waterproof Small Women's Pouch
$22.00
Pad Printing Machine Accessories: Positioning Clamps, T-Shaped Holders, and Locking Irons
$0.60
Japanese High-Concentration Oxalic Acid Toilet Cleaner, Powerful Urine Scale Remover and Stain Eliminator
$23.82
Biliansheng No-Shave Hair Transplant - Hairline and Crown Thinning Treatment, Hair Loss Detection Service
$86.00
Laorentou Paper Blending Stump for Sketching - Professional Art Supply for Highlighting and Pastel Work
$6.80
Fast-Drying Glue for ABS Plastic - Transparent, High-Strength, Odorless, Non-Whitening Instant Adhesive for ABS and PC Plastics
$58.96
Manufacturer Supply Oxygen Absorber Oxygen Generator Stable Performance Hydrogen-Rich Machine Hydrogen Generator
$5,058.00
POPMART CRYBABY Vacation Mode On - Vinyl Plush Keychain Blind Box
$106.99
Portable Travel Potty for Kids, Outdoor Toilet, Foldable Car Seat Potty for Babies, Travel Urinal for Outdoors
$29.90
Wen Zhengming Red Cliff & Tengwang Pavilion Copybook - 2-Volume Running Script Long Scroll for Calligraphy Practice
$22.00
Commercial Food Warmer Cabinet, Double-Layer Display Unit for Western Restaurants and Burger Shops, Wholesale Two-Tier Heating Showcase
$2,527.00
Electromagnetic Pulse Valve Blow-Type Submerged Right-Angle Explosion-Proof Solenoid Valve
$152.00
![[Customizable] Blank DIY Bookmarks - Thickened Hard Cardstock in Multiple Sizes with Tassels for Kindergarten and Elementary Art, Calligraphy, and Reading Gifts](https://www.gosteppe.com/cache/medium/product/386159/legacy-main-05a2e5e73e5ac60017fbef5e.webp)
