TLG® Qualitative Filter Papers No.5 have optimal retention of fine particles and slow flow rate, making them suitable for filtration of cloudy suspensions, as well as water and soil analysis. These filters are useful for Büchner funnel filtration and clarifying cloudy liquids. SPECIFICATIONS Material: Cellulose Porosity: Fine Surface: Smooth, Dense Particle Retention in Liquid: 2.5µm Herzberg Filtration Speed: 1480sec/100mL (or ASTM: 250sec) Nominal Thickness: 210 ± 10µm Nominal Weight: 100g/m² Nominal Ash Content : 0.06% Package Size: 100 Pieces