Grade 91 Qualitative Filter Paper Wet-Strengthened, 190mm Circle, Pks of 100, 1000ct SKU: 1091-190

Qualitative Filter Paper - 1091-190

Gravity filtration setups require paper that wets uniformly, seats flat in funnels, and retains particles at the rated threshold. Uniform pore distribution across the sheet area ensures consistent particle capture from center to edge during gravity filtration. Altogether, certificate of conformance documentation accompanies each lot, providing traceability for quality systems and regulatory audit requirements.

Key Filter Paper Characteristics

• Uniform fiber distribution across the sheet ensures consistent particle retention from edge to center for reproducible filtration results.
• Standard construction provides the soft, conformable surface that seats properly in gravity filtration funnels without edge leakage.
• 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.
• Available in precut circles and sheet stock to match funnel sizes and custom cutting requirements across laboratory applications.

Reporting filtration parameters alongside your analytical results demands documented grade, retention, and lot traceability for reviewer confidence. Cotton linter cellulose provides the clean fiber background your general analytical methods need without the cost of specialty grades. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

190mm

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

• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• 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.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.