Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 50, 460 mm × 570 mm, Whatman (CAT#: STEM-L-4421-LC)

The Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 50 manufactured by Whatman is ideal for qualitative or quantitative filtrations with vacuum assisted Büchner or 3-piece filter funnels.

Material: Cotton filters
Packaging: Pack of 100
Parameter: 2685 sec/100 mL speed (Herzberg), 6 psi wet burst
L × W: 460 mm × 570 mm
Thickness: 0.12115 μm
Ash: ≤0.015%
Pore size: 2.7 μm (Particle retention)
Basis weight: 97 g/m²

Retain very fine crystal precipitation.
The flow rate is slow.
Hardened and highly polished surface. The surface treatment can also keep the paper away from loose fibers on the surface.
Very strong when wet.
Withstand wet treatment and allow removal of sediment by scraping.

Whatman^® Quantitative Filter Paper, Hardened Low-Ash, Grade 50, Diam. 125 mm, Whatman (CAT#: STEM-L-4422-LC)