TLG® Qualitative Filter Papers No.3 are typically used in qualitative analytical techniques for the determination and identification of materials. Due to the extra thickness, they are greatly suitable for suction filtration with Büchner funnels. Compared to Filter Papers No.1, these filter papers have higher precipitate capacity (with little to no clogging) and higher absorption (suitable for sample carrier). SPECIFICATIONS Material: Cellulose Porosity: Medium Fine Surface: Smooth, Grained Particle Retention in Liquid: 6µm Herzberg Filtration Speed: 338sec/100mL (or ASTM: 90sec) Nominal Thickness: 370 ± 10µm Nominal Weight: 165g/m² Nominal Ash Content : 0.06% Package Size: 100 Pieces