Chromatography Blotting Paper - 2378-2020 - Grade 237, 20cm x 20cmAhlstrom Munksj Grade 237 0. 42 mm 150 mm 30 min This medium thick paper is recommended for general applications with medium heavy solute loading. Like Grade 238, this grade is ideal for use as wicks in protein or nucleic acid blotting to provide a uniform flow of butter through the gel to the transfer membrane in a blotting sandwich. Grade 237 is also suited for electrophoresis and the separation of inorganic compounds. (100 box)