Glass Microfiber Filter Paper - 1210-2500 - Grade 121, 25cm 161 Grade 54 is also used

Grade 54 is also used in air pollution testing to determine gaseous compounds

This standard grade found in many environmental applications offers slightly more retention than Grade 111 with slightly lower filtration speed and loading capacity

This high performance grade is designed to retain extremely fine particles down to 0

Grade 74 covers a wide range of general ashless filtration applications

Glass Microfiber Filter Paper - 1210-2500 - Grade 121, 25cm 161 Grade 54 is also usedAhlstrom Munksj 121 1. 0 m, Medium Speed This very thick grade offers finer particle than Grade 111 with high wet strength and loading capacity. Grade 121 is recommended for the clarification of liquid suspensions loaded with fine particulates. Grade 121 is also used in membrane pre filtration and is also found in quantification of solids, and LSC (Liquid Scintillation Counting) techniques that require high loading capacity.