Grade 287 ½ Qualitative Filter Paper, Folded (Prepleated)

Kieselguhr prepleated paper with a medium to slow flow rate and dditional adsorption effect.

• Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses.
• Decreased overall filtration time because of the extra surface area exposed; the normal slow down of filtration speed due to the loading of particulate is postponed.
• Increased total loading capacity as more filter area is available.
• Maintained flow rate due to the reduction in filter paper contact with funnel side and the self-supporting shape of the filter itself.
• The prepleating does not significantly affect any of the technical data, and the same figures may be used for the flat circles.

Time-saving Whatman qualitative grades are offered in this convenient form, which gives major advantages over flat circles.

Grade 287 ½

Additional adsorption effect e.g. for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry.

Specifications:

• Grade: Grade 287 ½
• Grade Type: Folded (Prepleated)
• Typical Thickness: 360 µm
• Basis Weight: 154g/m²
• Filtration Speed (Herzberg): Approx. 330s
• Properties: Kieselguhr

Ordering Information: