Filter paper, qualitative

The absorbent paper strips are made of qualitative filter paper. They are suited to absorb excess fluids such as staining solutions for microscope specimens.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2020, medium to slow filtering, particle retention 5-13 µm, filtration speed 88 s according to DIN 53137, basis weight 73 g/m², thickness 0.16 mm

For fast filtration with fine particles for general, electrolytic application in schools, research, health care, food and cosmetics industry.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2015, medium to slow filtering, particle retention 5-8 µm, filtration speed 50 s according to DIN 53137, basis weight 87 g/m², thickness 0.16 mm

For fast filtration with fine particles, when the filtration speed plays a minor role.

The LABSOLUTE® extraction thimbles are made of 100 % cellulose. They have a high mechanical stability and are free from binders. The extraction thimbles have a wall thickness of about 1 mm and a pore size of approximately 5 µm. They are perfect for all kind of Soxhlet extractions as well as for the separation of liquid and solid particles out of air and gases.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2020, medium to slow filtering, particle retention 5-13 µm, filtration speed 88 s according to DIN 53137, basis weight 73 g/m², thickness 0.16 mm

For fast filtration with fine particles for general, electrolytic application in schools, research, health care, food and cosmetics industry.

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2105, fast filtering, particle retention 12-15 µm, filtration speed 10 s according to DIN 53137, basis weight 84 g/m², thickness 0.20 mm, wet strengthened

For large-volume or gel-like deposits (e.g. hydroxides of iron and copper or sulphides of iron and cobalt). Especially high mechanical strength and resistance to acids and alkalis.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2005, fast filtering, particle retention 12-15 µm, filtration speed 10 s complies with DIN 53137, basis weight 84 g/m², thickness 0.20 mm

For large-volume or gel-like deposits (e.g. hydroxides of iron and copper or sulphides of iron and cobalt).

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2010, medium fast filtering, particle retention 8-12 µm, filtration speed 20 s according to DIN 53137, basis weight 84 g/m², thickness 0.17 mm

The most frequently used filter for analytical work, e.g. malt analyses according to EBC, precipitation of silver sulphide, precipitation of chromates (iron, lead, arsenic).

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2015, medium to slow filtering, particle retention 5-8 µm, filtration speed 50 s according to DIN 53137, basis weight 87 g/m², thickness 0.16 mm

For fast filtration with fine particles, when the filtration speed plays a minor role.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2005, fast filtering, particle retention 12-15 µm, filtration speed 10 s according to DIN 53137, basis weight 84 g/m², thickness 0.20 mm

For large-volume or gel-like deposits (e.g. hydroxides of iron and copper or sulphides of iron and cobalt).

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2025, slow filtering, particle retention 3-5 µm, filtration speed 100 s according to DIN 53137, basis weight 84 g/m², thickness 0.15 mm

For precipitation such as zinc, nickel and tin sulphide, calcium fluoride and calcium hydroxide.

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2110, medium fast filtering, particle retention 17-30 µm, filtration speed 22 s according to DIN 53137, basis weight 73g/m², thickness 0.17 mm, wet strengthened

For large volume or gel-like precipitation. Especially high mechanical strength and resistance to acids and alkalis.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2010, medium fast filtering, particle retention 8-12 µm, filtration speed 20 s according to DIN 53137, basis weight 84 g/m², thickness 0.17 mm

The most frequently used filter for analytical work, e.g. malt analyses according to EBC, precipitation of silver sulphide, precipitation of chromates (iron, lead, arsenic).

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2030, very slow filtering, particle retention 2-3 µm, filtration speed 180 s according to DIN 53137, basis weight 84 g/m², thickness 0.14 mm

For difficult filtration requirements or very fine precipitates (e.g. barium sulphate, copper oxide, tin oxide)

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2115, medium to slow filtering, particle retention 5-8 µm, filtration speed 50 s according to DIN 53137, basis weight 84 g/m², thickness 0.15 mm, wet strengthened

For fast filtration with fine particles, when the filtration speed plays a minor role. Especially high mechanical strength and resistance to acids and alkalis.

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2130, very slow filtering, particle retention 2-3 µm, filtration speed 180 s according to DIN 53137, basis weight 84 g/m², thickness 0.14 mm, wet strengthened

For difficult filtration requirements or very fine precipitates (e.g. barium sulphate, copper oxide, tin oxide) Especially high mechanical strength and resistance to acids and alkalis.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2025, slow filtering, particle retention 3-5 µm, filtration speed 100 s according to DIN 53137, basis weight 84 g/m², thickness 0.15 mm

For precipitation such as zinc, nickel and tin sulphide, calcium fluoride and calcium hydroxide.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2035, very slow filtering, particle retention 2 µm, filtration speed 300 s according to DIN 53137, basis weight 80 g/m², thickness 0.14 mm

For fine and very fine precipitates, e.g. in sample preparation, beverage industry for residual sugar determination and HPLC.

The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2030, very slow filtering, particle retention 2-3 µm, filtration speed 180 s according to DIN 53137, basis weight 84 g/m², thickness 0.14 mm

For difficult filtration requirements or very fine precipitates (e.g. barium sulphate, copper oxide, tin oxide)

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2105, fast filtering, particle retention 12-15 µm, filtration speed 10 s according to DIN 53137, basis weight 84 g/m², thickness 0.20 mm, wet strengthened

For large-volume or gel-like deposits (e.g. hydroxides of iron and copper or sulphides of iron and cobalt). Especially high mechanical strength and resistance to acids and alkalis.

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2110, medium fast filtering, particle retention 17-30 µm, filtration speed 22 s according to DIN 53137, basis weight 73g/m², thickness 0.17 mm, wet strengthened

For large volume or gel-like precipitation. Especially high mechanical strength and resistance to acids and alkalis.

The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. The qualitative filter papers are manufactured from pure cellulose with a proportion of alpha-cellulose of almost 100 %. The ash content is about 0.06 %.

Grade 2115, medium to slow filtering, particle retention 5-8 µm, filtration speed 50 s complies with DIN 53137, basis weight 84 g/m², thickness 0.15 mm, wet strengthened

For fast filtration with fine particles, when the filtration speed plays a minor role. Especially high mechanical strength and resistance to acids and alkalis.

Medium fast, pore size 5 to 8 µm or 5 to 13 µm.

Medium fast, pore size 5 to 8 µm.

• For fast filtration with fine particles

Medium fast, pore size 5 to 13µm.

• for analytical works in laboratories

Very fast, pore size 12 to 15 µm.

Slow, pore size 2 to 3 µm.

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

Medium fast filtration, smooth.
For fat determinations, free from fats and resins. Ether soluble residue <0.1 mg for diam. 270 mm filters.

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.

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

Medium filtration, smooth.

Fast filtration, smooth.

Medium speed, smooth.

For detecting nutrients available to plants, low in nitrogen and phosphorus.

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

Suitable for analytical methods in breweries to filter and analyse, based upon recommended procedures of the EBC (European Brewery Convention).

• Medium fast
• Grained surface

Qualitative. Folded (pre-pleated) version of Number 2.

Housing MBS. SFCA / CA (Surfactant-free Cellulose Acetate) membrane. For sterile, particle free, ultrapure filtration of small volumes of liquid up to approx. 100 ml. Colour coded and printed for easy membrane and pore size identification. With hydrophilic cellulose acetate membrane for minimum adsorption. Ready-to-use. With female luer-lock inlet, male luer slip outlet.

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%

Dimensions: 580 x 580 mm, creped.
Other dimensions are available on request.

Slow < 2µm

• thick filter paper
• for fine precipitates
• Weight: 84g/m²
• Thickness: 0.16mm

Medium fast, 4 - 7µm

• time saving, because folded filters have a larger surface area
• for medium to fine precipitates
• Weight: 85 g/m²

Very slow, <2 µm

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

Medium fast, 4 to 12 µm. White ribbon.

• for the analysis of foodstuffs
• for carbonates of alkaline earth metals, (NH₄)₃[P(Mo₃O₁₀)₄] x aq., Mg(NH₄)PO₄, CaC₂O₄ (hot precipitates)
• Weight: 85g/m²
• Thickness: 0.18mm

Medium-fast.

• Embossed
• For determination of sugar content, colour, essential oils and emulsions
• Weight: 75 g/m²
• Thickness: 0.25 mm

Suitable for analytical and gravimetric analyses, as well as a pre-filter.

• Hydrophilic
• Liquid Filtration
• Non-sterile

Circles and sheets. Qualitative. Very thick. Double the thickness of number 1.

Soft, 9 sec. filtration time, smooth.

Medium to slow 2 to 5µm

• time saving, because folded filters have a larger surface area than comparable circular filters
• for medium to fine precipitates and general laboratory work
• Weight: 85g/m²
• Thickness: 0.17mm

Fast, 12 to 25µm

• time saving, because folded filters have a larger surface area
• filter faster than comparable circular filters
• for coarse precipitates (e.g. hydroxide and sulphide)
• Weight: 80g/m²
• Thickness: 0.19mm