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COBB Tester



For the determination of the water absorption of sized paper and board, including corrugated fibreboard, under standard conditions. It may not be suitable for paper of less than 50 g/m² or for porous papers such as newsprint or un-sized papers such as blotting paper or other papers having a relatively high water absorption. A test piece is weighed immediately before and immediately after exposure of one surface to the water for a specified time, followed by blotting. The result of the increase in mass is expressed in grams per square metre (g/m2). The standard model has a test area of 100 cm². The model NV50 is delivered with 100, 50 and 10 cm² area.

• When cylinder is turned – timer starts automatically
• For couching only the drawer mounted under the 10 kg couch roll is moved
• Quick and simple test

3 Versions available:

P 95933:
Automatic instrument with built-in couch roll and pivoting cylinder

Instrument with quick clamping and extra 10 kg couch roll (smaller areas e.g. for cigarette papers with 10 cm²) are available

Instrument with knurled screws, but with 3 areas (100, 50 and 10 cm²)

Technical data
Electricity: Battery operated stopwatch
Dimensions (WxDxH): 32x22x17 cm
Net weight: 12 kg
Gross weight: 16 kg

Applicable standards: TAPPI T 441, ISO 535, SCAN P12, DIN 53132, EN 20535, PAPTAC F.2


Isimat, 12079 World Trade Drive, Suite 4, San Diego CA 92128

Tel.: 858 485 8855, Fax: 858 487 0531, e-mail: info@isimatlab.com