Packaging Testing Instruments, Paper Testing Instruments
Cobb Water Absorbency Tester
Model KCT-350 | Cobb Value Testing Machine for Paper & Packaging Board
The Katpot Systems Cobb Tester (Model KCT-350) is a precision instrument designed to measure the water absorbency (Cobb value) or liquid penetration capacity of paper, cardboard, corrugated board, and other sheet materials.
It determines how much water a material absorbs within a specific time — a key factor in assessing printability, coating quality, and packaging performance.
The tester provides quick, accurate, and repeatable results, ensuring that materials meet required quality and resistance standards.
Designed for quality control, R&D, and production testing, it complies with international standards such as ISO 535, TAPPI T441, and ASTM D2045-647.
Ideal for paper mills, packaging units, printing plants, and coating manufacturers.
Advanced Features
- Measures water absorbency and surface resistance with high accuracy
- Standard 100 cm² test area for repeatable and comparable results
- Durable stainless-steel test cylinder for long service life
- Smooth clamp and sealing system prevents water leakage
- Quick testing cycle with easy water filling and draining
- Heavy-duty roller ensures uniform removal of excess water
- Compact bench-top design for QA and production labs
- Maintenance-free, corrosion-resistant construction
Product Importance
- Determines the water absorbency rate and surface resistance of paper and packaging materials.
- Ensures suitability for printing, coating, and lamination processes.
- Prevents issues like curling, swelling, or weakening of paper due to excess moisture absorption.
- Helps optimize coating formulations and improve material surface treatment.
- Ensures consistency in product quality and compliance with international packaging standards.
- A critical test for industries producing cartons, corrugated boxes, paperboards, and coated sheets.
Technical Specifications
| Model No | KCT-350 |
|---|---|
| Type | Manual Cobb Tester |
| Test Area | 100 cm² (Standard) |
| Water Reservoir Capacity | 100 ml (adjustable as per standard) |
| Test Duration | 60 seconds (standard; customizable) |
| Material Compatibility | Paper, cardboard, corrugated board, coated sheets |
| Roller Assembly | Heavy-duty roller for uniform water removal |
| Compliance Standard | ISO 535 / TAPPI T441 / ASTM D2045-647 |
| Construction | Stainless-steel cylinder with aluminium base |
| Finish | Corrosion-resistant powder coating |
| Operation Type | Manual, easy-to-use design |
