Bekk Smoothness Tester & Related Standard
Smoothness Tester
Accurate and Efficient Bekk Smoothness Test for Paper and Board
About Us
Smoothness Tester
In quality control of paper and board products, smoothness test is a critical indicator that directly affects print quality, coating uniformity, and product performance. The ST-01 Smoothness Tester by Cell Instruments offers a high-precision, automated solution for evaluating the smoothness of paper using the internationally recognized Bekk method. This instrument provides reliable, repeatable measurements compliant with ISO 5627, DIN 53107, and TAPPI T479, making it a key tool for paper mills, packaging manufacturers, and testing laboratories worldwide.
Add Your Heading Text Here
Headline Describing Your Company Core Values Will Come Here
01
Add Your Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
02
Add Your Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
03
Add Your Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Reliable Bekk Smoothness Testing for Quality Assurance
What is Smoothness Test and
Why It Matters
A smoothness test answers two questions: What is it? and What problem does it solve
Smoothness Test Definition
The smoothness test measures how long (in seconds) air takes to flow through a defined gap under vacuum between a paper surface and a ring‑shaped anvil. This value, known as Bekk smoothness, correlates directly with the surface quality of the paper. The longer the time, the smoother the surface.
Smoothness Test Definition
The smoothness test measures how long (in seconds) air takes to flow through a defined gap under vacuum between a paper surface and a ring‑shaped anvil. This value, known as Bekk smoothness, correlates directly with the surface quality of the paper. The longer the time, the smoother the surface.
Problem solved for Surface Smoothness Test
Inconsistent surface smoothness leads to poor ink lay‑down, uneven coatings and printing defects. Accurate smoothness data helps manufacturers control quality, reduce waste and satisfy tight tolerances.
Applicable Fields and Typical Applications
"We will write a hypothetical testimonial from a satisfied customer. You can replace this with actual testimonials from your clients. Testimonials are a great way to inspire potential customers to trust you."
– Testimonial Author Name
"We will write a hypothetical testimonial from a satisfied customer. You can replace this with actual testimonials from your clients. Testimonials are a great way to inspire potential customers to trust you."
– Testimonial Author Name
"We will write a hypothetical testimonial from a satisfied customer. You can replace this with actual testimonials from your clients. Testimonials are a great way to inspire potential customers to trust you."
– Testimonial Author Name
ST-01 Smoothness Tester
Technical Specifications
| Parameter | Specification |
| Test area | (10±0.05) cm² |
| Measuring range | （1-9999）S, (1-15)S, (15～300) S, (300～9999) S, three range switch |
| Volume | Big Vacuum 380±1ml; Small Vacuum (38±1) ml |
| Vacuum range | I gear 50.66kPa -> 29.33kPa |
| II gear 50.66kPa -> 48kPa | |
| III gear:50.66kPa -> 48kPa | |
| Test Pressure | (100±2) kPa (Automatic pressure) |
| Dimension | 380x360x465 mm |
| Power | AC 220V 50Hz |
Add Your Heading Text Here
Add Your Heading Text Here
01
Add Your Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
02
Add Your Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
"We will write a hypothetical testimonial from a satisfied customer. You can replace this with actual testimonials from your clients. Testimonials are a great way to inspire potential customers to trust you."
– Testimonial Author Name
Frequently Asked Questions about Bekk Smoothness Test
What is the main purpose of a smoothness test?
It measures the surface evenness of paper or board to evaluate its suitability for printing, coating, and sealing applications.
How does the ST-01 differ from other Bekk smoothness testers?
The ST-01 features automatic pressure application, intelligent range detection, and a user-friendly touch interface for faster, more accurate testing.
Is the Bekk smoothness test suitable for very smooth or rough paper types?
It is best for smooth to moderately smooth samples. For extremely smooth or very rough samples, special vacuum chambers or alternate methods may be needed.
What is the difference between Bekk smoothness and Parker smoothness?
Bekk tests air flow under vacuum conditions, while Parker uses oil to fill surface voids under pressure; Bekk is preferred for printing‑grade papers.
Does paper thickness affect smoothness readings?
Materials up to 0.5 mm are suitable; thicker or highly permeable boards can skew results due to air leakage through the substrate.