Filter paper, qualitative

Extra dense, very slow filtration, smooth.

Medium fast filtration, smooth.

Medium to fast, 7 to 12 µm

• smooth filter paper
• for filtering coarse-grained suspensions
• Weight: 75 g/m²
• Thickness: 0.18 mm

Circles. Qualitative. Fast flow. Excellent retention of coarse and gelatinous precipitates, creped.

Circles. Prepleated. Qualitative. Excellent retention of coarse and gelatinous precipitates, creped.

Circles. Qualitative. Thin and very strong. Smooth surface.

Circles. Prepleated. Qualitative. Thin and very strong. Smooth surface.

Circles. Quantitative. Hardened. Ashless. Highly retentive for fine precipitates.

Circles. Qualitative. Slow, faster as Grade 5. Supplied in packs of circles as outlined below.

Very smooth surface, very strong, with enhanced wet strength. Chemically stable against acids and weak alkalis, especially suited to vacuum and pressure filtration.

Highly pure filter paper (approx. 0.08% ash) recommended for precise identification of materials and for sample preparation prior to sensitive detection methods. These filter papers are perfectly qualified for food control according to LFBG paragraph 64 para. 1 and 2, beverage analysis and environmental monitoring.

• Made of the same raw materials (super-refined cotton linters and cellulose) like quantitative filter papers
• High stability and durability due to alpha-Cellulose content above 95%

Highly pure filter paper (approx. 0.08% ash) recommended for precise identification of materials and for sample preparation prior to sensitive detection methods. These filter papers are perfectly qualified for food control according to LFBG paragraph 64 para. 1 and 2, beverage analysis and environmental monitoring.

• Made of the same raw materials (super-refined cotton linters and cellulose) like quantitative filter papers
• High stability and durability due to alpha-Cellulose content above 95%

Fast, grained.

For carrying out germ resistance tests. All papers are made from high-purity cellulose and are free of spores, bacteria and toxic substances that could influence the germination of the seeds. The highly absorbent papers store water for the entire duration of the tests. All germ test papers meet the requirements of ISTA and AOSA.

• Reliable seed testing
• Conductivity 40 mS/m
• pH value between 6.0 and 7.5
• High absorbance
• Roots do not grow through the paper
• Papers conform to ISTA recommendations of 2017

GB 003, GB 005. High purity. Very absorbent. Easy to use. Suitable for all protein and nucleic acid blotting techniques.

Compatible with Hirsch or Büchner funnels, average thickness 115 µm. Acid-treated for high wet-strength and chemical resistance.

• Nominal particle retention of 2.7 µm
• Slow flow rates (Herzberg filtration speed 2685 s)
• High purity and low ash content (0.015 % ash maximum)

Recommended for chromatographic analysis and preparations.

• Made from pure linters with an α-cellulose content of > 98%
• High-performance resolution and wet strength
• The fibres are oriented in predominantly one direction
• Thicker papers allow higher sample volumes
• Lower capillary rises offer higher resolutions

Recommended for the seperation of very fine semi-colloidal turbidities.

• Weight 196 g/m²
• High adsorption rate
• Minimum content of activated carbon 35 %
• Filtration speed acc. to Herzberg 360 s
• Thickness 0.52 mm

Fast, 12 to 25µm

• wet-strength
• time saving, because folded filters have a larger surface area than circular filters of the same diameter
• Weight: 88g/m²
• Thickness: 0.17mm

Slow 2 to 4µm

• for fine precipitates
• Weight: 75g/m²
• Thickness: 0.15mm

Medium to fast, 8 to 10µm

• thick filter paper
• for fast filtration of coarse precipitates
• Weight: 140g/m²

Slow < 2 µm

• thick filter paper
• for fine precipitates
• Weight: 85 g/m²
• Thickness: 0.15 mm

Recommended for the detection of very fine traces of light-coloured particles and precipitates.

• Made of pure celluloses and with constriction of black additives
• White and light-coloured particles can be detected easily by the strong contrast to the black filter paper
• Weight 95 g/m²
• Thickness 0,2 mm
• Filtration speed acc. to Herzberg 850 s