Filter Papers

Filter Papers

Broad range of filter papers. You can choose from quantitative, qualitative, qualitative-technical filter papers, blotting and chromatography filter papers and many other paper grades for special applications. Our filter papers are depth filters and typical applications are particle retention in gases or aqueous solutions.

Quantitative Papers

Filtration rate: the time required to filter 10 ml of distilled water at 20 °C through a free-hanging, fully-wetted disc filter with a diameter of 110 mm folded in quarters. Expressed in seconds (per mm).

Color-doted dot Grade Precipitation Properties g/m² Particle retention (µm) Filtration rate (s)
Black dot 388 Coarse crystalline Wide-pored,spongy structure, high rate of filtration 84 12-15 10
White dot 389 Medium-fine crystalline Medium-wide-pored, medium-fast rate of filtration 84 8-12 20
Yellow dot 389F Medium-fine crystalline Medium-wide-pored, medium-fast rate of filtration, low-fat content 84 8-12 20
Red dot 392 Fine crystalline Medium density, moderately fast rate of filtration 84 5-8 50
Green dot 390 Fine crystalline Narrow-pored, dense, slow rate of filtration 84 3-5 100
Blue dot 391 Very fine crystalline Fine-pored, highly dense, very slow rate of filtration 84 2-3 180
Purple dot 393 Very fine crystalline extra fine-pored and dense, very slow rate of filtration 100 1-2 300

Qualitative Papers

Filtration rate: the time required to filter 10 ml of distilled water at 20 °C through a free-hanging, fully-wetted disc filter with a diameter of 110 mm folded in quarters. Expressed in seconds (per mm).

Grade Precipitation Properties Basis Weight Particle retention (g/m²) Filtration rate (µm)
1288 Coarse crystalline Wide-pored, soft, spongy structure, wet strength, fast rate of filtration 84 12-15 10
1288 N Coarse crystalline Wide-pored, soft, spongy structure, wet strength, fast rate of filtration extra wet strengthened 84 12-15 10
1289 Medium-fine crystalline Medium-wide-pored, wet strength, medium rate of filtration 84 8-12 20
1292 Fine crystalline Medium density, wet strength, moderately, fast rate of filtration 84 5-8 50
1290 Fine crystalline Narrow-pored, dense, wet strength, slow rate of filtration 84 3-5 100
1291 Very fine crystalline Fine-pored, highly dense, wet strength, very slow rate of filtration 84 2-3 180
293 Very fine crystalline Fine-pored, highly dense, very slow rate of filtration 80 1-2 300

Smooth Technical Papers

Filtration rate: the time required to filter 10 ml of distilled water at 20 °C through a free-hanging, fully-wetted disc filter with a diameter of 110 mm folded in quarters. Expressed in seconds (per mm).

Grade Basis weight (g/m²) Thickness (mm) Filtration rate (s)*
3 h 65 0.13 35
3 hw 65 0.14 20
3 m/N 65 0.14 30
3 w 65 0.14 15
488/N 65 0.13 60
4 b 75 0.15 22
41 b 75 0.15 22
6 80 0.17 15
131 80 0.16 100
132 80 0.17 55
100/N 85 0.18 30
918 85 0.17 45
460/N 90 0.18 50
62 90 0.22 17
94/N 100 0.22 25
1220 103 0.53
54 115 0.24 17
10 120 0.33 7.5
50 S 120 0.22 30
10/N 120 0.33 7.5
C 140 140 0.30 20
1632 150 0.63
69 K 155 0.38 65
3 S/h 200 0.36 55

Creped Technical Papers

Filtration rate: the time required to filter 10 ml of distilled water at 20 °C through a free-hanging, fully-wetted disc filter with a diameter of 110 mm folded in quarters. Expressed in seconds (per mm).

Grade Basis weight (g/m²) Thickness (mm) Filtration rate (s)*
FT 55 55 0.15 5
34/N 60 0.20 4
67/N 60 0.20 15
601/N 65 0.19 13
1602/N 70 0.23 5
67/N 70 0.23 15
1444 70 0.27 18
603 75 0.25 8
603/N 75 0.25 8
34/N 80 0.25 5
226 (blue) 80 0.25
21/N 80 0.28 10
67/N 80 0.33 14
5 H/N 85 0.28 3
17/N 90 0.30 20
67/N 90 0.33 13
33/N 90 0.35 4
22/NS 90 0.35 10
18/N 100 0.35 25
37/N 135 0.50 4
6 S/N 145 0.55 12
67/N 160 0.65 13
39/N 180 0.65 5
39/N 240 0.83 7
39/N 300 0.95 5

Filter Boards

Grade Basis weight g/m² Thickness in mm
64 100 0.22
A 140 140 0.25
1632 150 0.63
SB 2 155 0.34
S 165 165 0.33
C 160 160 0.30
A 250 250 0.40
C 250 250 0.43
1600 250 0.50
C 251 250 0.55
M 270 270 0.62
1522 280 0.60
C 300 300 0.52
1339 315 0.63
152 A 340 1.00
C 350 350 0.63
C 350 L 360 0.75
LF 1 360 0.90
167 360 360 0.90
152 380 0.90
0.90 420 1.30
C 450 450 0.95
151 460 0.90
1220 475 1.10
511 490 1.25
S 500 500 1.00
K 12 520 1.50
SEK 550 550 1.25
M 600 600 1.60
157 700 1.80
SEK 770 770 1.00

Germination Test

Grade Basis weight (g/m²) Thickness (mm) Capillary rise (mm/10 min) Colour of the paper
1750 90 0.20 85 white
1755 82     white, PE-coated
50 S 120 0.22 100 white
20 115 0.26 95 white
20 grey 110 0.22 70 grey
1700 135 0.31 > 65 white, embossed
1701 135 0.31 > 55 white, embossed
190 300 0.65   blue, plain
1731 400 0.78 90 white, embossed

Sample Carrier

Grade Basis weight (g/m²) Thickness (mm) Capillary rise (mm/10 min)
TFN 179 0.47 >170

Nonwovens

Grade Material Basis weight (g/m²) Thickness (mm) Max. pore size (µm) Many pore sizes (µm)
2601 Rayon (viscose) 20 0.19 200 75
2601 Rayon (viscose) 60 0.46 95 50
2701 Polyester 20 0.16 180 140
2701 Polyester 60 0.20 80 60

Blotting Papers

Grade Basis weight (g/m²) Thickness (mm) Capillary rise (mm/10min)
BF 1 90 0.16 80
BF 2 195 0.35 70
1600 250 0.50 80
BF 3 330 0.76 130
BF 4 550 1.30 160

Chromatography

GradeBasis weight g/m²Thickness in mmCapillary rise mm/30 min
FN 1900.20145
FN 21200.25145
FN 3900.1995
FN 41200.2495
FN 5900.1760
FN 61200.2260
FN 71500.32145
FN 7a2000.41145
FN 82800.55170
FN 303200.90235
FN 1001950.35115
27 CH7001.30170

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