Ashless filter papers are particularly suited for quantitative routine analysis and are manufactured from refined pulp and linters.
They are acid-washed and have an extremely low ash content of <0.01%. The amount of
a
cellulose is about 95%.
Ashless filter papers
Technical data
Grade
Colour Code
Properties
Thickness
Filtration
speed
Basis
weight
2
MN 640 w
we very fast filtration, smooth
0.22 mm
9 s
85 g/m
2
MN 640 we
º
No. 41 grey label
º
black ribbon
fast filtration, smooth
0.2 mm
5 s
85 g/m
2
MN 640 m
º
No. 43 white label
º
white ribbon
medium fast filtration, smooth
0.2 mm
27 s
85 g/m
2
MN 640 md
º
No. 40 yellow label
º
red ribbon
medium to slow filtration, smooth 0.2 mm
55 s
85 g/m
2
MN 640 dd
º
No. 44 blue label
º
green ribbon
slow filtration, smooth
0.16 mm
100 s
70 g/m
2
MN 640 d
green label
º
blue ribbon
slow filtration, smooth
0.17 mm
140 s
85 g/m
2
MN 640 de
º
No. 42
very slow filtration, smooth
0.2 mm
195 s
100 g/m
Ø
MN 640 we MN 640 w MN 640 m MN 640 md MN 640 dd MN 640 d MN 640 de
Ordering Information
References for packs of 100 filters
55 mm
20 10 05
20 20 05
20 30 05
20 40 05
20 60 05
20 50 05
20 70 05
70 mm
20 10 07
20 20 07
20 30 07
20 40 07
20 60 07
20 50 07
20 70 07
90 mm
20 10 09
20 20 09
20 30 09
20 40 09
20 60 09
20 50 09
20 70 09
110 mm
20 10 11
20 20 11
20 30 11
20 40 11
20 60 11
20 50 11
20 70 11
125 mm
20 10 12
20 20 12
20 30 12
20 40 12
20 60 12
20 50 12
20 70 12
150 mm
20 10 15
20 20 15
20 30 15
20 40 15
20 60 15
20 50 15
20 70 15
185 mm
20 10 18
20 20 18
20 30 18
20 40 18
20 60 18
20 50 18
20 70 18
240 mm
20 10 24
20 20 24
20 30 24
20 40 24
20 60 24
20 50 24
20 70 24
320 mm
20 10 32
20 20 32
20 30 32
20 40 32
20 60 32
20 50 32
20 70 32
Quantitative Filter Papers
Filtration Products
MN
8
