Whatman
Grade 595 1/2 Qualitative Filter Paper Folded (Prepleated), 240mm, 100/Pk SKU: 10311651

Qualitative Filter Paper - 10311651

Gravity filtration setups require paper that wets uniformly, seats flat in funnels, and retains particles at the rated threshold. Standard basis weight specifications provide predictable filter packing density for volumetric displacement calculations in funnel assemblies. In combination, lot-level verification of retention, thickness, and ash content ensures predictable performance when scaling from method development to routine analysis.

Key Filter Paper Characteristics

• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• Uniform fiber distribution across the sheet ensures consistent particle retention from edge to center for reproducible filtration results.
• Standard construction provides the absorption and wicking characteristics that gravity-based filtration protocols require.
• Manufactured to a basis weight of 68g/m², each sheet delivers the documented mass consistency that gravimetric methods require.
• Compatible with standard glass and plastic filter funnels, qualitative paper integrates into existing gravity filtration setups without modification.

Reporting filtration parameters alongside your analytical results demands documented grade, retention, and lot traceability for reviewer confidence. For this application, standard qualitative construction integrates into your existing funnel hardware, requiring no new equipment investment for reliable results. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

Diameter

240mm

Flow Speed

Medium Fast

Folded/ Fluted/ Pleated

Yes

Grade

595

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

68g/m²

Particle Retention

4-7um

Pore Size (µm)

4.0-7.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.
• Enzyme Clarification - Removes particulates from enzyme solutions before activity assays in biochemistry and industrial testing.
• Gelatin Clarification - Removes debris from gelatin solutions used in pharmaceutical capsule manufacturing and quality testing.
• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.