Grade 961 Wet-Strengthened Qualitative Filter Papers (Ahlstrom) are fast filtering with extremely high loading capacity, is recommended for the filtration of coarse and gelatinous precipitates. The creped surface of Grade 961 also offers higher surface area to increase filtration speed.

Key Features

• Retention: 40.0µm
• Filtration Speed: 19 sec/100mls (Herzberg), 360 mls/min (Rapidity)
• Very High Loading Capacity
• Equivalent to Grade 113