Recommended for filtration of the finest semi-colloidal turbidities.For separation of very fine semi-colloidal turbidityClarification of extracts of soil suspensions, of milk serum, of starch solutions and sugar-containing solutions prior to polarimetry and refractometryFor retention of protein precipitates and slime particles from solutionsClarification of urine samples
Hardened ashless filters, especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.Acid-washed and rinsed with waterFree of minerals and metallic ions, ideal for the detection of trace metalsHigh wet strength, easy to scrape off or wash off precipitatesHigh resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40 % at 50 °C) and alkalis (up to 10 % at 20 °C)
Recommended for the clarifying filtration of beet extracts and juices prior to analysis. High filtration speed combined with high retention of particles.
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code blackRapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code whiteMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code blueSlow filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code yellowMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code redMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Slow filtration. These ashless filter papers are used for quantitative and gravimetric analyses as well as for pressure and vacuum filtration.
Acid-treated for high wet-strengthExtremely low ash content (0.006 % ash maximum)Nominal particle retention of 8 µmMedium flow rate (Herzberg filtration speed 200 s)High chemical resistance to strong acid and alkali suspensions
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 20 to 25 µm.Most frequently used quantitative filterFor PbS, Ag2S, FeS, carbonatesAshless, equivalent white tape
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 2 to 3 µm. For very fine precipitates and small particlesFor soil analysisFor BaSO4 (hot precipitate), PbSO4, Cu2O, ZnS, NiSAshless, equivalent blue tape
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 5 to 8µm.For NH4MgPO4, CaC2O4, BaSO4Ashless, equivalent red tape
Fast filtration, smooth, ashless. With elevated border.
Recommended for the clarifying filtration of beet extracts and juices prior to analysis. High filtration speed combined with high retention of particles.
High wet-strengthHigh chemical resistance to strong acid and alkali suspensionsRetention of gelatinous precipitate22 µm nominal particle retention ratingFast flow rate (Herzberg filtration speed 34 s)Maximum of 0.006 % ash concentration
Medium fast, 4 to 12 µm. White ribbon.for the analysis of foodstuffsfor carbonates of alkaline earth metals, (NH4)3[P(Mo3O10)4] x aq., Mg(NH4)PO4, CaC2O4 (hot precipitates)Weight: 85g/m²Thickness: 0.18mm
Slow < 2 µm. Blue ribbon.for very fine precipitates and small particlesfor soil analysisfor BaSO4 (hot precipitate), PbSo4, Cu2O, ZnS, NiSWeight: 84 g/m²Thickness: 0.16 mm
Rapid filtration, coarse porosity.Other formats and diameters are available on request.
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 15 to 20 µm.For coarse, high volume precipitatesFordeterminations according to the German Standard Methods for the examination of water, waste water and sludgeForFe(OH)2, Al(OH)3, NaSO4Ashless, equivalent black ribbon
Ashless. For filtration of coarse and gelatinous precipitates.
Cellulose materials used to coagulate precipitates and as a prefilter layer in funnels. Quantitative grade is used for filter aids except for ordinary clippings. Ashless.
Medium speed filtration.Other formats and diameters are available on request.
Very slow filtration.Other formats and diameters are available on request.
Medium fast filtration.Other formats and diameters are available on request.
Rapid filtration, coarse porosity.Other formats and diameters are available on request.
Medium speed filtration.Other formats and diameters are available on request.
Medium fast filtration.Other formats and diameters are available on request.
Very slow filtration.Other formats and diameters are available on request.
Very low ash content (0.007 % ash concentration maximum)Intermediate particle retention rating of 16 µmHerzberg filtration speed of 155 sParticle collection between that of Grades 40 and 41
Accurate ash free dry mass measurementsFine nominal particle retention rating of 3 µmFiltration speed (Herzberg 995 s)Typical thickness of 180 µm
Acid treated for high wet-strength and chemical resistanceLarge nominal particle retention rating of 22 µmFast filtration speed (Herzberg filtration speed 39 s)High purity (0.015 % ash maximum)Compatible with Büchner funnel or Hirsch funnel applications