Paper water absorptiveness tester COBB tester with blotting paper 10Kg roller COBB testing

Product group
Paper and Board Tester

Cell Instruments Co., Ltd.

Cell Instruments Co., Ltd.

Product description

Product Details:

Place of Origin: China
Brand Name: Cell Instruments
Model Number: COBB-

Payment & Shipping Terms:

Minimum Order Quantity: 1 set
Packaging Details: export carton
Delivery Time: 7 days
Payment Terms: TT LC
Supply Ability: 100 sets/week

Detailed Product Description

Power: Electronic
Usage: Paper Testing Instrument

Paper water absorptiveness tester measures the surface water absorption of paper and paper board. Loose paper, e.g. newsprint, unsized paper, e.g. blotter and other high absorbability paper is not for this tester.

Paper water absorptiveness tester principle

The Cobb value of surface water absorption of paper and paperboard.:

The calculated mass of water absorbed in a specified time by a unit area of paper or board under specified pressure and temperature conditions. It is expressed in g/㎡.


C-water absorptiveness

G2-wet mass, in grams, of the test piece

G1-dry mass, in grams, of the test piece

When Cobb value is less than 200~250 g/㎡ for single layer, more layers can used.

Paper water absorptiveness tester technical data

Metal roller sectional area 100±0.2㎝2
Metal roller diameter 112.8±0.2mm
Roll height 50mm
Blotting paper 200~250g/㎡
Absorption speed 75mm/10min
Smooth metal roller length 200±0.5mm, mass10±0.5kg.
Water volume 100mm±5ml.
Dimension 480×400×420(mm)


ISO 535, GB/T 1540, QB/T 1668

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