Cobb Sizing Testers


Water absorptiveness (Cobb value) is the mass of water absorbed in a specific time by a 1 sq. meter sample of paper, board or corrugated under conditions specified in standards such as TAPPI T 441. Cobb sizing testers provide a simple, standardized method for fast determination of the quantity of water absorbed by a paper or board in a given time.

Corrugated Testing, Paper and Tissue Testing
Corrugated and Board, Paper and Pulp
Other Property, Porosity


  • Single-handed automatic clamping and release
  • Manual clamping and sample positioning

Instrument Size

  Manual Clamping
  Depth:   140 mm (5.5 in.)
  Height:   80 mm (3.0 in.)
  Width:   140 mm (5.5 in.)
  Weight:   2 kg (4.4 lb.)
  Automatic Clamping
  Depth:   200 mm (8.0 in.)
  Height:   180 mm (7.0 in.)
  Width:   200 mm (7 in.)
  Weight:   2 kg (4.4 lb.)



Ordering Information

Automatic Clamping  
Used for Description Catalog Number
Paper Cobb Size Tester for Paper, with automatic clamping and release. Area within cylinder 100 square centimeters. 61-05-00-0002
Board Cobb Sizing Tester for Corrugated feature a single handed automatic clamping
and release system for ease use. An increased thickness rubber gasket is supplied.
Manual Clamping  
Size(s) Description Catalog Number
100 sq. cm. Cobb Sizing Tester with 100 sq. cm. cylinder and gasket. Per TAPPI T 441 61-04-00-0002
10, 25, 100 sq. cm Cobb Sizing Tester. Includes 100, 25, and 10 square centimeter cylinders and gaskets. Meets T 441 and T 2045 61-04-00-0001
10, 25, 100 sq. cm Cobb Sizing Tester. Includes 100, 25, and 10 square centimeter cylinders, gaskets, 10 kg Roller and 300 Sheets Blotting Paper. Meets T 441 and T 2045 61-04-00-0003
Required Accessories  
  Description Catalog Number
Stainless Steel
Hand Roll
Hand Roll -Couch Roller for Cobb Sizing tester. Weight of roller complies with TAPPI standard specifications, 10kg. +/-.5 kg.) 61-04-01
Blotting Paper 203 x 203 mm (8” X 8”), Package of 1200 sheets. 61-04-05
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