Cobb tester is a test of the water absorption capacity of the paper or cardboard surface. Cobb value: Under certain conditions, within a specified period of time, the mass of water absorbed by the surface of the carton board per unit area is expressed in grams per square meter (g / m2).
*Total test time recommended by international standards to remove excess water and perform water absorption
Recommended time (S) | Mark | Time of remove excess water (S) | Time to finish absorbing water (S) |
30 | cobb30 | 20±1 | 30±1 |
60 | cobb60 | 45±1 | 60±2 |
120 | cobb120 | 105±2 | 120±2 |
300 | cobb300 | 285±2 | 300±2 |
1800 | cobb1800 | 1755~1815 | After remove excess water 15±2 |
Technical parameter
Test water volume: 100mL±5mL;
Roll length: 200mm±0.5mm;
Roll mass: 10kg±0.5kg;
Dimension:(396×315×300)mm;
Net weight: about 32kg.