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Cobb Size Tester - OpTest

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Cobb Size Tester

To measure the water absorbance of paper or board manually (NV100) or with automatic clamping jaws (NV102).

Product Name Cobb Size Tester
Product Code PTA-NV10X
Standards/Methods TAPPI T 441, ISO 535, SCAN P12, DIN 53132, EN 20535, BSEN 20535, PAPTAC F2
Test Material Paper, Board
Manufacturer The PTA Group / Noviprofibre (PTA)
Availability from OpTest Exclusive to Canada, USA, and Mexico

Available Models:

NV100 – Manual Cobb Size Tester
NV102 – Automatic Cobb Size Tester

 

• Quick sample clamping (by means of two springs).
• Sample test area of 100 cm2.
• 10 kg roll in stainless steel.
• Rubber sealing joint.
• Stainless steel construction.
• Weight (equipment only / with packaging): 13 kg / 15 kg
• Dimensions (W x L x H - equipment only / with packaging): 200 x 300 x 180 mm / 300 x 400 x 200 mm

 

Test Description:
The Cobb method application requires:
1. Apparatus built with rigid cylinder, lower section is 100 +/- 0.2 cm², weight about 5 cm with automatic clamping.
2. Reference NVR: roller in polish metal, 200 mm length, with 90 mm diameter +/- 10 mm and weight is 10 kg +/- 0.5 kg.
3. Reference NVB: blotting paper with basis weight equal at 250 g/m² +/- 25 g/m². Applicable standard ISO 5269-1
4. Basis weight with accuracy at 1 mg
5. Chronometer to read time in second until 30 minutes

 

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