Product Introduction 
The paper water absorption tester operates on the Klemm capillary rise principle. A standard-sized strip specimen (250×15 mm) is suspended vertically with its lower end immersed in water. Under standard temperature conditions, water rises along the specimen through capillary action. After a specified time (typically 10 minutes), the height reached by the water on the specimen is read from the graduated scale, expressed as capillary rise height in mm/10min. The instrument can test 10 specimens simultaneously with 5 graduated scales having 1 mm graduation, within a measuring range of 0-200 mm. This method intuitively characterizes the liquid absorption properties of unsized paper and paperboard.

Key Features 
Standard Klemm Method Design Designed in full accordance with the GB/T 461.1-2002 Klemm method, compliant with QB/T 1662 and JJG (Light Industry) 55-90 standards.
Wide Range, Accurate Measurement Measuring range of 0-200 mm with 1 mm scale graduation, meeting capillary rise measurement needs for most unsized paper and board.
Simultaneous Multi-Specimen Testing Tests up to 10 specimens at once with 5 graduated scales for efficient batch testing and convenient comparative analysis.
Standard Specimen Size Compatibility Specimen dimensions of 250×15 mm comply with standard specifications, ensuring standardized and comparable test results.
Compact Structure, Easy Operation Overall dimensions of 430×270×420 mm; benchtop design, intuitive operation, simple maintenance.
Clear Paper Type Applicability Specifically designed for capillary rise measurement of unsized paper and paperboard, suitable for absorbent material evaluation.
Durable and Reliable Construction Clear, wear-resistant graduated scales; overall robust structure suitable for long-term frequent laboratory use.
Multi-Industry Applicability Suitable for quality testing in paper mills, material research at scientific institutions, university teaching experiments, and more.

Main Technical Specifications

FAQ 
1. What types of paper are suitable for this instrument?
It is primarily used for unsized paper and paperboard. It is not suitable for paper and board with capillary rise less than 5 mm in 10 minutes, nor for sized papers.

2. Why is a minimum capillary rise of 5mm in 10 minutes specified?
If the capillary rise is less than 5 mm in 10 minutes, the material has extremely low absorbency, and the sensitivity of the Klemm method is insufficient, leading to relatively large reading errors. Alternative methods should be used to evaluate absorbency in such cases.

3. How are test results read and recorded?
At the end of the specified test time (typically 10 minutes), read the highest point reached by the liquid on each specimen directly from the graduated scale, with reading accuracy to 1 mm. Take the average of multiple specimens as the test result.

4. Can different types of paper samples be tested simultaneously?
Yes. The instrument accommodates up to 10 specimens simultaneously, with each tested independently. However, it is recommended to test the same type of specimens in one batch for convenient statistical analysis.

5. What are the requirements for the test water?
Distilled or deionized water is typically used, and the temperature should be kept constant (generally under standard ambient temperature conditions). Refer to the GB/T 461.1-2002 standard for specific requirements.

6. How should the instrument be cleaned and maintained?
After testing, wipe the graduated scales and specimen holders with a soft cloth to keep them dry and clean. Avoid moisture-induced deformation or scale wear. Periodically check that specimen clamping devices remain secure.

After-Sales Service
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Paper Water Absorption Tester comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and absorbency testing method consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.