Products

Weighing paper

In square sheets. 100 % cellulose without binder. Surface weight: 25 g/m². Suitable for food applications. Paper used for the weighing of substances of all kinds, more particulary in the sugar industry to determine beets sugar content

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PRAT DUMAS qualitative filter paper for general use, medium flow rate

Maximum ash content 0.10%. Vellum paper used for general laboratory filtration. Surface weight 65 g/m², pore 7 -10 μm, thickness 170 μm. Available in flat disks (packed in foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 93

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PRAT DUMAS qualitative filter paper for general use, very fast flow rate

Maximum ash content 0.06%. Paper consisted of long cotton fibers for thick and sticky liquids filtration. Thick and very resistant paper, offering the fastest flow among qualitative filters. Surface weight 130 g/m², pore 25 - 30 μm, thickness 430 μm. Available in flat disks and folded. Equivalent to: Whatman 114

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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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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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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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PRAT DUMAS hardened quantitative filter paper, medium 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. Medium flow rate is the adequate for a general use, being the intermediate filter in terms of flow rate and retention. High wet resistance. Surface weight 80 g/m², pore 8 - 12 μm, thickness 270 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 52

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PRAT DUMAS hardened quantitative filter paper, fast 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. Its flow rate makes it recommendable for large precipitates, such as iron hydroxyde and other metal sulfates. High wet resistance. Surface weight 80 g/m², pore 12 - 16 μm, thickness 250 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 54

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