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 demineralized water. This process allows reaching an ash content below 0.01%. These papers are used to count during demanding analysis.
| Cat. No. | Description | Pore Size | Diameter |
| FT-QT41A0045 | Quantitative filter paper, Very Fast | 25–30 μm | 45 mm |
| FT-QT41A0055 | Quantitative filter paper, Very Fast | 25–30 μm | 55 mm |
| FT-QT41A0070 | Quantitative filter paper, Very Fast | 25–30 μm | 70 mm |
| FT-QT41A0090 | Quantitative filter paper, Very Fast | 25–30 μm | 90 mm |
| FT-QT41A0110 | Quantitative filter paper, Very Fast | 25–30 μm | 110 mm |
| FT-QT41A0125 | Quantitative filter paper, Very Fast | 25–30 μm | 125 mm |
| FT-QT41A0135 | Quantitative filter paper, Very Fast | 25–30 μm | 135 mm |
| FT-QT41A0150 | Quantitative filter paper, Very Fast | 25–30 μm | 150 mm |
| FT-QT41A0158 | Quantitative filter paper, Very Fast | 25–30 μm | 158.5 mm |
| FT-QT41A0185 | Quantitative filter paper, Very Fast | 25–30 μm | 185 mm |
| FT-QT41A0210 | Quantitative filter paper, Very Fast | 25–30 μm | 210 mm |
| FT-QT41A0240 | Quantitative filter paper, Very Fast | 25–30 μm | 240 mm |
