These COBB Absorption Tester developed by us according to national standards. It is mainly used to measure the surface water absorption of sized paper and cardboard, including corrugated fiberboard.
But it may be not suitable for paper and cruddy paper with a density lower than 50g/m2. Likewise, it may be not applicable for loose paper (for example, newsprint) or unsized paper (for example, blotting paper) or other paper with high water absorb ability.
This COBB Absorption Tester is only capable of testing surface water absorption of paper and board. It is not applicable to exactly evaluate the writing performance of paper and board.
Application
Paper. paper board .
Standards
ISO535. GB/T1540

Specification
1. Test Area100±0.2cm2
2. Test water 100±5ml
3. Roll Length 200±0.5mm
4. Roll mass 10±0.5kg