Grade 591 Qualitative Filter Paper Standard Grade, Sheet, 580x580mm, 250/Pk SKU: 10311387

Qualitative Filter Paper - 10311387

Laboratories processing dozens of samples daily need a qualitative filter paper that performs reliably from the first sheet to the last. Pure cotton linter cellulose provides a uniform fiber matrix with consistent porosity and predictable retention across standard grade designations. Ultimately, quality-controlled production produces filter paper with the documented consistency that reproducible analytical and preparative methods demand.

Key Filter Paper Characteristics

• Wet-strengthened construction maintains paper integrity during prolonged vacuum and pressure filtration of aqueous samples.
• At 7-12um rated retention, the fiber matrix captures particles above the threshold while allowing smaller materials to pass through.
• Uniform fiber distribution across the sheet ensures consistent particle retention from edge to center for reproducible filtration results.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.
• At 161g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.

If your laboratory supports multiple research groups with varying filtration needs, this paper's broad applicability simplifies your procurement process. With this in mind, broad grade availability lets you match retention, flow rate, and thickness to each specific application in your method library. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

Dimensions

580 x 580mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

No

Grade

591

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

0.06%

Nominal Basis Weight (g/ m²)

161g/m²

Particle Retention

7-12um

Pore Size (µm)

0.7-12.0

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.
• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.
• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.
• Beverage Testing - Filters wine, beer, and juice samples before clarity and color measurements in food quality control laboratories.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.