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Johnson Analytica

Qualitative Wet-Strengthened Filter Paper (Whatman Grade 93 - JTP Grade 322)

£3.78 vat excl.

£4.54 vat Inc.
Availability: Out of stock

Wet-strengthened filter papers are manufactured from a majority of alpha-cellulose. The smooth surface allows for fibre free filtration. They feature a high wet strength and can also be used in the filtration of strong alkaline or acid solutions. Due to their high mechanical strength, they are suited to applications where the residue is removed from the filter, for example with a spatula or a jet of water.

Qualitative Standard Filter Paper (Whatman Grade 1 - JTP Grade
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Johnson Analytica

Qualitative Standard Filter Paper (Whatman Grade 1 - JTP Grade 304)

£4.47 vat excl.

£5.36 vat Inc.
Availability: Out of stock

What is Grade 304? This grade covers a wide range of laboratory applications and is used for clarifying liquids and for the rapid filtration of coarser precipitates such as lead sulfate, lead chromate, calcium oxalate, calcium carbonate, aluminum phosphate, barium carbonate and beryllium hydroxide.

Grade 304 can be found in soil analysis, seed testing and in air pollution to collect dust-laden air and is also commonly used in the food industry to separate foodstuffs from associated extracting liquid.

Specification:

  • Sizes Whatman Cross Reference = No.1
  • Speed class Medium
  • Filtering Thickness (mm) 0.16
  • Pore size (μM) 5-13
  • Weight (g/m²) 73
  • Filtration Speed (sec*) 88
  • Burst Strength (Kg/cm²) 1.95