Grade 91 Qualitative Filter Paper Wet-Strengthened, 61x61cm Sheet, 500 Pk SKU: 1091-935

Qualitative Filter Paper - 1091-935

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. By design, controlled manufacturing delivers the documented retention, flow rate, and physical consistency that analytical and preparative filtration methods require.

Key Filter Paper Characteristics

• Strengthening treatment preserves paper structure through extended filtration runs where continuous wetting would weaken standard grades.
• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• At 71g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.
• Standard basis weight and thickness specifications provide predictable packing density for volumetric calculations in gravity funnels.

When your budget requires balancing performance with cost efficiency, the documented consistency above ensures you're not paying for premium features you don't need. Cotton linter cellulose provides the clean fiber background your general analytical methods need without the cost of specialty grades. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

Dimensions

610mm x 610mm

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.
• 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.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.