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AB Lorentzen & Wettre Paper Cobb Sizing Tester - Water absorptivness / Cobb Value
L&W Cobb Sizing Tester
Measures the sizing of paper and corrugated board
L&W Cobb Sizing Tester measures the weight increase of a sample, when exposed to water for a given time.
Sizing and absorption are important properties, not only for writing and printing results, but also for the appearance of the material after handling and practical use in real life. This method for measuring water absorption of sized papers is used all over the world.
Simple operation
The procedure, including the duration of certain stages, is specified in each standard. A dry test piece of suitable size is weighed and placed under the cylinder. Then 100 ml of water is poured over the test piece. After a specified time the water is poured off and the test piece is placed on a standardized blotting paper.
Another blotting paper is placed on top of the test piece and the excess water is removed by means of the couch roller. The test piece is weighed again and the results are calculated and reported as
absorptiveness in grams, per m² according to the standard method.
- Single handed operation
- Fast locking of the sample
- Couch roll is included
- L&W Cobb Sizing Tester is also available in a special version with rubber gasket for corrugated board
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Specification
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L&W Cobb Sizing Tester – Code 146
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Inclusive
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Couch roll
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Instrument
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Test area
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100 cm²
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Level indication
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Indication for 100 ml on the inside of the cylinder
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Dimension cylinder
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Diameter 200 mm, height 200 mm (8 × 8 in)
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Dimension couch roll
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Diameter 88 mm (3.6 in), width 210 mm (8 in), |
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Results
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Measurement values |
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Option
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Version for corrugated board
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Maximum thickness of corrugated board is 15 mm. Equipped with rubber gasket at the bottom of the cylinder.
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Size
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Dimensions
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0.3 × 0.3 × 0.5 m |
Volume
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0.05 m³ |
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Net weight
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13 kg |
Gross weight
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18 kg |
Standards
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Applicable standards
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APPITA/AS 1301.411, CPPA F.2, DIN 53132, FEFCO No 7, ISO 535, SCAN P 12, TAPPI T 441, EN 20535
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Related standards
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SCAN P 18, TAPPI T 458
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