Cobb sizing tester
Cobb sizing tester Manufacturer
Model ELI- PS
Working Principle of Cobb Sizing Tester
The procedure for using the Cobb sizing tester
The standard operating procedure (SOP) of Laboratory Testing Instruments adheres to ISO standards to ensure quality and consistency in all processes. This includes following established guidelines and protocols outlined by ISO to maintain high standards of performance, reliability, and safety across all operations.
- Prepare the Sample: Get a piece of corrugated box and weigh it precisely.
- Set Up the Tester: Place a cork sheet on a metal plate, and then add the sample. Clamp it tightly to prevent leaks. Optionally, use a soft gasket for extra sealing.
- Add Water: Pour water into the fixture based on sample requirements.
- Hold the Sample: Keep it in the tester for the specified time: 120 seconds for paper, 300 seconds for a cobb test for corrugated board.
- Check for Leakage: Reject any sample showing leakage. Ensure it doesn’t touch liquid during the test.
- Completion Alert: When the test ends, a buzzer will sound. Remove the sample.
- Drain Excess Water: Use a hand roller to remove any extra water.
- Final Weighing: Weigh the sample again to find out how much water it absorbed. That’s it.
To calculate the Cobb value, follow this simple formula:
Cobb value = Weight of the sample after testing – Weight of the sample before testing.
This formula helps determine how much water the paper absorbs during testing. Using Laboratory Testing Instrument’s Cobb tester, you can easily conduct the Cobb test according to the specified standards.
- High-Grade Stainless Steel Test Area: Durable and corrosion-resistant.
- Easy and hassle-free operation with one hand.
- Fast Locking Mechanism: Ensures quick and secure locking.
- Highly Accurate Results: Provides precise testing outcomes.
- Lightweight and Resilient: Portable yet sturdy construction.
- Rugged Structure: Built with a strong and durable main body.
- Corrosion-Resistant: Protects against corrosion for long-lasting performance.
- Sample Diameter: Around 130 mm
- Roller Weight: Approximately 10 kg
- Rubber Pad Diameter: About 145 mm
- Water Level Indicators in Cylinder: Marked at 10 mm and 25 mm
- Cylinder Depth: 60 mm
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FAQ's
A Cobb tester is designed to measure the water absorptivity of Cobb test paper or corrugated cardboard, providing crucial insights into their quality and performance.
Cobb value is calculated by subtracting the weight of the sample after testing from the weight of the sample before testing, employing a simple yet effective formula.
The Cobb test paper conforms to the ISO 535 standard, ensuring consistency and reliability in testing methodologies across different regions and industries.
In determining the absorption capacity of paper and corrugated boxes, the Cobb value of paper is a crucial parameter that guides product design, material selection, and quality assurance decisions.
Yes, Cobb testers are available in a price range of 16,000 INR to 22,000 INR in India, making them accessible and cost-effective tools for quality testing, even for small-scale businesses.