A widely used standard grade filter paper for routine applications with medium retention and flow rate.

- Single thickness thimbles have a wall thickness of approximately 1 mm (10.0 μm nominal particle retention)

- Pore Size: 1.5μm
- High retention, Fast flow

Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed).

A standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels.

- 1.0μm Pore size
- 3x thicker than GF/A

Fast flow & retention of coarse precipitates

Whatman Membrane Filter, Cellulose Nitrate (Type WCN)

Whatman Membrane Filter, PTFE (Type WTP)

Whatman Membrane Filter, Nylon (Type WNYL)

- Pore size: 1.2μm
- Good flow, For suspended solid in wastewater

Finest particle retention)

Fastest flow, For coarse retention

Medium flow & retention rate

- High flow rate