Low ash paper (< 0.06%). Medium flow rate, suitable for a wide range of laboratory applications, frequently used in liquid clarification. It is used for rapid filtration of fine precipitates such as lead sulfate, hot calcium oxalate and calcium carbonate, as well as for routine techniques in the food and environmental industry. Weight 85 g / m², thickness 180 μm, filtration time 40 s, retention 10 – 13 μm, air flow 11 s / 100 ml / in², Herzberg 170 s / 100 ml, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 1
Low ash paper (< 0.06%). Low flow rate, suitable for fine particle filtration. It is used in difficult filtration conditions, extra-fine precipitates, barium sulfate and copper oxide, as well as for the clarification of cloudy suspensions. Specified for wine clarification. Weight 85 g / m², thickness 170 μm, filtration time 300 s, retention 3 – 5 μm, air flow 93 s / 100 ml / in², Herzberg 2500 s / 100 ml, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 5
Crêpped surface, rough, for general laboratory use. Very high flow rate. Weight 70 g/m², thickness 250 μm, retention 25 μm, pressure difference 8 mm WG, ash content <0.1%. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 114
For general laboratory use. Medium flow rate. Weight 65 g/m², thickness 180 μm, filtration time 30 s, retention 7 – 10 μm, wet bursting strength >30 kPa, ash content max. 0,1%. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 93
Paper made from 100% borosilicate glass microfiber, without binder. Fast filtration with a retention of fine particles. Adsorbs the finest particles down to 1 μm from liquids and below 1 μm in gases, aerosols included (HEPA). Indicated for controls of environmental pollution and ozone levels, as well as for controls of the content of algae in water. Can be used at temperatures up to 500°C. Surface weight 52 g/m², pore 1,6 μm, thickness 260 μm and retention DOP 99,998%. Available in flat disks. Equivalent to: Whatman GF/A, Macherey Nagel GF-1, S&S GF50
Paper made from 100% borosilicate glass microfiber without binder. Fast filtration with a retention of fine particles. Adsorbs the finest particles down to 1 ?m from liquids and below 1 ?m in gases, aerosols included (HEPA). Standard filter for determination of Total Suspended Solids (TSS) in drinking or sewage water according to European standards (EN 872) and American standards (Standard Methods 2540D). Can be used at temperatures up to 500°C. Surface weight 53 g/m², pore 1,2 ?m, thickness 260 ?m and retention DOP 99,998%. Available in flat disks. Equivalent to: Whatman GF/C, Macherey Nagel GF-3, Millipore AP40, S&S GF52
Hardened low ash paper (<0.015%) for non critical quantitative works. Its high flow rate makes it suitable for large precipitates, such as iron hydroxide and other metal sulfides, as well as for filtering dense and gelatinous liquids. Weight 90 g / m², thickness 200 μm, filtration time 10 s, retention 20 μm, wet bursting strength> 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 54
Hardened low ash paper (<0.015%) for non critical quantitative works. Medium flow rate, adequate for a general use, being the intermediate filter in terms of flow rate and retention. Suitable for tests on the intake of atmospheric pollution and used in fat extraction applications in a large number of analysis routines. Weight 90 g / m², thickness 190 μm, filtration time 50 s, retention 7 – 8 μm, wet bursting strength> 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 52
Hardened low ash paper (<0.015%) for non critical quantitative works. Slow filtration rate, with excellent retention of very fine particles, such as barium sulfate, zinc sulphide, etc. The hardened and glazed surface makes this paper suitable for use in the electronic industry, in carriers of electronic components or boards. Weight 90 g/m², thickness 180 μm, filtration time 300 s, retention 2 – 3 μm, wet bursting strength> 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 50
Ashless paper (<0.007%) made of cotton fibers. High flow rate, suitable for retention of bulky particles. It is used in the filtrate of coarse precipitates and gelatinous precipitates (hydroxides and metal sulfides). Weight 85 g / m², thickness 190 μm, filtration time 20 s, retention 20 – 25 μm, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 41
Ashless paper (<0.007%) made of cotton fibers for medium-slow filtration. Used for gravimetric analysis for numerous components, as well as all types of pre-filtrations. Suitable as a primary filter to separate solid matter and fine precipitates from aqueous extracts, soil analysis and quantitative determinations of fats and oils in water, sediments in milk and cleaning of solutions for AAS (Atomic Absorption Sprectrophotometry). Weight 85 g / m², thickness 170 μm, filtration speed 100 s, retention 7 – 9 μm, wet bursting strength> 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 40
Ashless paper (< 0.007%) made of cotton fibers. Very low flow rate, adequate for fine particles retention. Suitable for precipitate filtration of cold barium sulphate, lead sulphate, zinc and nickel sulphides, etc. Weight 100 g / m², thickness 160 μm, filtration time 300 s, retention 2 – 3 μm, wet bursting strength > 20 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 42
Low ash paper (< 0.06%) made of cotton fibers. High flow rate, suitable for the retention of coarse precipitates, such as hydroxides and metal sulphides, and gelatinous substances. It is also used for rapid filtering of organometallic precipitates, routine cleaning of biological fluids, analysis in the food industry, etc. Weight 85 g / m², thickness 210 μm, filtration time 10 s, retention 15 – 20 μm, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 4
