Grade 91 Qualitative Filter Paper Wet-Strengthened, 58x58cm Sheet, 500 Pk SKU: 1091-930

Qualitative Filter Paper - 1091-930

From student teaching labs to production QC departments, qualitative filter paper remains the workhorse for routine particle separation. Pure cotton linter cellulose provides a uniform fiber matrix with consistent porosity and predictable retention across standard grade designations. In practice, certificate of conformance documentation accompanies each lot, providing traceability for quality systems and regulatory audit requirements.

Key Filter Paper Characteristics

• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• At 10.0um rated retention, the fiber matrix captures particles above the threshold while allowing smaller materials to pass through.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.
• Wet strength sufficient for gentle handling during precipitate transfer while maintaining the rapid flow rates of qualitative grades.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.

If your laboratory supports multiple research groups with varying filtration needs, this paper's broad applicability simplifies your procurement process. For this application, wide retention range availability across the qualitative grade family lets you optimize each application in your sample preparation workflow. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Dimensions

580mm x 580mm

Flow Speed

Medium Fast

Folded/ Fluted/ Pleated

No

Grade

91

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

71g/m²

Particle Retention

10.0um

Pore Size (µm)

10

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

• Gelatin Clarification - Removes debris from gelatin solutions used in pharmaceutical capsule manufacturing and quality testing.
• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.
• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• Enzyme Clarification - Removes particulates from enzyme solutions before activity assays in biochemistry and industrial testing.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.