Wet-strengthened Filter Papers for Qualitative Analyses

These qualitative filter papers are essentially used for analytical purposes and routine analyses, whenever no gravimetric analyses are required. They are wet-strengthened and can be used for pressure and vacuum filtration. They are made of refined pulp and linters with an > 95% α-celluloose content, are very pure with an ash content < 0.1%.

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Wet-strengthened Filter Papers for Qualitative Analyses

Grade

Material

Weight
(g/m2)

Thickness
(mm)

Wet Bursting
Strength (kPa)

Ash content (%)

Particle
retention (µm)

Properties

1288

Refined pulp and Linters

84

0.21

≥30

<0.1

12 - 15

Wide pored, fast rate of filtration

1289

Refined pulp and Linters

84

0.21

≥30   

<0.1

8 - 12

Medium pored, medium-fast rate of filtration

1292

Refined pulp and Linters

84

0.17

≥30

<0.1

5 - 8

Medium pored, moderately fast rate of filtration

1290

Refined pulp and Linters

84

0.15

≥30

<0.1

3 - 5

Narrow pored, slow rate of filtration

1291

Refined pulp and Linters

84

0.15

≥30

<0.1

2 - 3

Fine pored, very slow rate of filtration

293

Refined pulp and Linters

80

0.15

≥20

<0.1

1 - 2

Very fine pored, very slow rate of filtration