Circles and sheets. Qualitative. Slightly thicker and more retentive than number 1.

Circles. Qualitative. General purpose schools grade, creped.

Circles. Qualitative. Fast flowrate. Excellent retention of coarse and gelatinous precipitants. Smooth. Supplied in packs of circles as outlined below.

The general purpose high efficiency glass microfibre filter. Particle retention to 1.6 µm.

Glass microfibre filters have a fast filtration and a high loading capacity and particle retention rate. Manufactured without chemical binder from high grade borosilicate glass. (Exception: GF6, GF9). They are suitable for gravity or low suction filtration. Filtration speeds generally very much higher than conventional cellulose papers. Efficient retention of micron size particles. Must be used flat. Ideal for use in flat perforated plate Buchner type funnels (not sintered glass models). Can be used up to 500 °C.
Extremely efficient filter made to retain fine particles and micro organisms. Particle retention to 1.2 µm.

Glass microfibre filters have a fast filtration and a high loading capacity and particle retention rate. Manufactured without chemical binder from high grade borosilicate glass. (Exception: GF6, GF9). They are suitable for gravity or low suction filtration. Filtration speeds generally very much higher than conventional cellulose papers. Efficient retention of micron size particles. Must be used flat. Ideal for use in flat perforated plate Buchner type funnels (not sintered glass models). Can be used up to 500 °C.
Three times thicker and with greater wet strength than GF/A. Particle retention to 1µm.

Medium fast, 4 - 7 µm.

• time saving, because folded filters have a larger surface area
• filter faster than comparable circular filters
• for medium to fine precipitates and general laboratory work
• Weight: 68 g/m²
• Thickness: 0.15 mm

Applications:

• Excellent for gravimetrical analysis
• Especially for aqueous solutions
• Ideally suitable for contamination test

• Economical
• Constant weight
• Hydrophilic
• Not sterile
• Can be used up to 125 °C
• Autoclavable up to 121 °C

Circles and sheets. Qualitative. The most widely used grade of filter paper.

Medium fast 4 to 7µm

• thin filter paper
• for medium to fine precipitates and general laboratory work
• Weight: 68g/m²
• Thickness: 0.150mm