Grade 4 Qualitative Filter Paper, Standard, 320mm Circle, 100/Pk SKU: 1004-320

Qualitative Filter Paper - 1004-320

Routine laboratory filtration demands a filter paper that delivers consistent particle retention without slowing sample throughput. Cellulose fiber matrix maintains structural integrity through standard gravity and light vacuum filtration conditions. Together, consistent physical properties across the full sheet area support uniform filtration results in both gravity and vacuum applications.

Key Filter Paper Characteristics

• Controlled ash level of 0.06% meets the blank value requirements of quantitative methods where filter contribution must be documented.
• Wet strength sufficient for gentle handling during precipitate transfer while maintaining the rapid flow rates of qualitative grades.
• 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.
• Medium porosity cellulose matrix captures suspended solids while maintaining the throughput needed for efficient batch processing.

When your application makes the filter paper part of the measurement, the ash and weight specifications above define its analytical contribution. For this application, consistent sheet-to-sheet performance reduces the variability your operators encounter during high-volume daily filtration workflows. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

320mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

No

Grade

4

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

0.06%

Nominal Basis Weight (g/ m²)

92g/m²

Particle Retention

25um

Pore Size (µm)

20.0-25.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.
• Gelatin Clarification - Removes debris from gelatin solutions used in pharmaceutical capsule manufacturing and quality testing.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Teaching Laboratory - Provides consistent and economical filtration media for student exercises in analytical and general chemistry.