The quantitative or ashless filter papers are made with 100% high quality cotton linter fibres, which go through a severe chemical process. They have been washed out with a specific acid treatment and finally cleaned from impurities with demineralised water. This process allows reaching an ash content below 0.01%. Slow filtration quantitative filter paper.
- Equivalent to Whatman grade 44
- Recommended for slow filtration.
- Weight: 74g/m2
- Thickness: 0.16mm
- Pore size: 7 - 9µm
- Filtration speed: 100s
- Supplied as plain discs
This product has met the following criteria: