Whatman
Grade 1573 1/2 Qualitative Filter Paper Folded (Prepleated), 185mm, 100/Pk SKU: 10314747

Qualitative Filter Paper - 10314747

Gravity filtration methods for removing suspended solids require filter paper that seats cleanly in funnels and retains particles consistently. Natural cellulose wettability eliminates the pre-wetting step required by hydrophobic membranes in aqueous sample filtration. From fiber selection through final inspection, the manufacturing process ensures every sheet meets the performance specifications of its grade.

Key Filter Paper Characteristics

• At 12-25um rated retention, the fiber matrix captures particles above the threshold while allowing smaller materials to pass through.
• Basis weight of 88g/m² indicates the fiber mass per unit area that controls retention, flow rate, and wet strength.
• Standard basis weight and thickness specifications provide predictable packing density for volumetric calculations in gravity funnels.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.

If your laboratory runs standardized filtration protocols, the lot-level consistency of this filter paper protects your method reproducibility. For exactly this reason, standard cellulose chemistry eliminates the need for specialized disposal procedures your general laboratory filtration generates. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

Diameter

185mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

Yes

Grade

1573

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

88g/m²

Particle Retention

12-25um

Pore Size (µm)

12.0-25.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.
• Beverage Testing - Filters wine, beer, and juice samples before clarity and color measurements in food quality control laboratories.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Enzyme Clarification - Removes particulates from enzyme solutions before activity assays in biochemistry and industrial testing.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.