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PRAT DUMAS Qualitative filter paper, low ash, slow flow rate
Low ash content paper (max 0.06%) used for fine filtration of small particles precipitates. Surface weight 100 g/m², pore 2 - 3 μm, thickness 200 μm. Available in flat disks and folded. Equivalent to: Whatman 5
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PRAT DUMAS Qualitative filter paper, low ash, medium flow rate
Superior Vellum paper made of pure cellulose and low ash (max 0.06%). General use in laboratory. Surface weight 85 g/m², pore 10 - 12 μm, thickness 200 μm. Available in flat disks and folded. Equivalent to: Whatman 1
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PRAT DUMAS Qualitative filter paper, low ash, fast flow rate
Low ash paper (max 0.06%) made of cotton fibers, used for thick and sticky liquids filtration. Surface weight 85 g/m², pore 10 - 12 μm, thickness 200 μm. Available in flat disks and folded. Equivalent to: Whatman 4
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BRANCHIA ashless quantitative filter paper, medium-low flow rate
Ashless paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 40
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BRANCHIA ashless quantitative filter paper, high flow rate
Ashless paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 41
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PRAT DUMAS ashless quantitative filter paper, fast flow rate
Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Its quick flow rate makes it recommendable for large precipitates, such as iron hydroxide and other metal sulfates. Surface weight 80 g/m², pore 12 - 16 μm, thickness 250 μm. Available in flat disks. Equivalent to: Whatman 41
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PRAT DUMAS quantitative filter paper, slow flow rate
Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Used for critical gravimetrical analysis. Surface weight 80 g/m², pore 7 - 9 μm, thickness 290 μm. Available in flat disks. Equivalent to: Whatman 42
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PRAT DUMAS quantitative filter paper, medium flow rate
Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Used for routine gravimetrical analysis. Intermediate filter in terms of flow rate and retention. Surface weight 80 g/m², pore 8 - 12 μm, thickness 270 μm. Available in flat disks. Equivalent to: Whatman 40
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BRANCHIA hardened quantitative filter paper, slow flow rate
Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 50
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BRANCHIA hardened quantitative filter paper, medium flow rate
Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 52
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BRANCHIA hardened quantitative filter paper, high flow rate
Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 54
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PRAT DUMAS hardened quantitative filter paper, slow flow rate
Hardened low ash paper (max 0.02%), as an intermediate solution between quantatitive ash free paper (max 0.002%) and qualitative paper low ash (max 0.06%) for non critical quantitative works. Recommended for thin precipitates, such as barium, lead, zinc or nickel sulfate, barium fluoride or barium hydroxide. High wet resistance. Surface weight 80 g/m², pore 7 - 9 μm, thickness 290 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 50
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