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%. Equivalent to Whatman grade 40, recommended for medium filtration.
- Weight 84g/m2
- Thickness 0.2mm
- Pore size 14-18µm
- Filtration speed 55s
- Supplied in packs of 100
This product has met the following criteria: