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.
Jingdezhen Pink Peony Flourishing Tea Canister Ceramic Lidded Loose Tea Storage Jar CYG-4578 One Jin Capacity Pu'er
$450.60
Round Sponge Brush Stamp with Mushroom Head – Printing Tool for Kindergarten Art and Kids' Crafts
$0.27
Metal Wick Centering Tool with Wooden Base for DIY Scented Candle Making
$1.28
Custom Temporary Bank Account Opening Sign, Company Signboard, Stainless Steel Door Plate, PVC Simple Plaque, Acrylic Advertising Board
$15.20
Natural Raw Crystal Diffuser Stones 500g - Same Style as Certain Summer Brand, Flameless Indoor Decor (White, Green, Purple, Yellow, Black, Blue)
$10.20
Iron Chain, Flower Pot Hanging Chain with Iron Rings, Black Suspension Chain for Bird Cages and Garden Planters
$0.10
Sheepskin Rattle with Brass Bells - Handmade Wooden Peach Wood Baby Toy for Chewing, Perfect for Children's Day
$10.80
Commercial Square Insulated Warmer Cabinet with Constant Temperature Heating, Countertop Display Case for Roast Duck, Chicken, Fried Chicken, Smoked Goose, and BBQ Meat
$338.00
PISEN Desktop Cable Organizer - Magnetic Data Cord Manager, Soft Silicone Fixed Wire Winder with Adhesive Clips, Mini Portable Hub
$10.10
Handcrafted Peach Wood and Sheepskin Rattle with Brass Jingle Stick – Traditional Chewable Wooden Baby Toy
$74.00
ABB DC Drive DCS550-S02-0050-05-00-00 – Brand New, Genuine, Authorized Distributor
$10,838.20
Waterproof Storage Bag for Clothes and Bathroom Use, Large-Capacity Drawstring Organizer for Men and Women, Outdoor Travel and Toiletry Pack
$39.90
Zhu Ma Household Entrance Steel Road Speed Bump, New U-Buffer Speed Limit Rubber Surface for Cars and Railways
$3,668.00
Huaboshi Thickened Resin Vegetable Planter Box – Rectangular Plastic Balcony Grow Container with Drainage Tray
$45.99
New Data Cable Storage Bag Travel Digital Charger Cord Organizer Protective Visible Multi-Use Portable Case
$1.64
Press Wash Blade for KBA Printing Presses - Model KBA105 Ink Scraper, 1160*40mm
$40.50
Genuine Pirelli Run-Flat Car Tire P7 225 245 275 285/35 40 45 R18 19 20 21
$336.00
Chuangshidai 100XP Compact Desktop Fume Extractor for Soldering Irons - Rapid Smoke Purification
$696.00
Multi-Function Kitchen Sink Rack - Dish Drying Organizer for Bowls and Plates
$33.10
Water Brush Kids Water Painting Book Graffiti Special Pen Water Sketchbook Eco-Friendly Safe Tap Water Refillable Pen Set
$2.16
No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer
$8.90
Jingdezhen Blue and White Porcelain Antique Brush Washer, Traditional Chinese Painting Calligraphy Brush Rinse Basin, Large and Small Water Pots
$16.90
Sketch Blending Stump Set for Art Students - Highlight Detail Shadow Tool Kit with Replacement Sponge Heads for Beginners
$9.00
Changyiyou Outdoor Large-Capacity Wheeled Duffel Bag - Thickened Storage Backpack with Wheels for Camping Gear and Travel
$109.00
Lightweight Waterproof Dry Bag for River Trekking and Rafting – Travel Storage for Clothes, Shoes, Socks with Moisture-Proof Buckle, Roll-Top Carry Design
$15.80
Tupai 3D Self-Adhesive Wall Stickers, Custom Acrylic Logo Advertising Letters for Signage, Background Walls, and Image Wall Decor
$8.50
Durable Replacement DEUBLIN 525/357 Water Inlet/Outlet Rotary Union for Curved Surface Printing and Cup Printing Machines
$300.00
Detachable Large Water Barrel Rack for Mineral and Purified Water, Office Bottled Water Storage Stand with Wheels
$136.00
Tea Packaging Gift Box - Empty Ceramic Tea Canister for Longjing, Green Tea, White Tea, Ripe Pu'er, Universal Packaging
$68.00
Ruke Floating Skimmer Machine for Sewage Treatment Plant Biochemical Tanks
$12,064.00
![[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)
