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LABORATORY FILTER PAPERS
QUALITATIVE FILTERS
Grade 1288 - wide-pored, spongy structure, soft, very high rate of
filtration
coarse-flocculent and bulky precipitates, in particular hydroxides of iron,
aluminium and chromium; sulphides of copper, bismuth, cobalt and iron;
various organic metal precipitates;
determination of silicon in the analysis of steel and pig iron, etc.
Basis weight
84 g/m
2
Filtration velocity:
10 ml / 10 seconds
Typical pore size:
12 - 15 µm
Similar to:
Whatman 4, S&S 604, M-N 617
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.206.055 1288 / Filter discs.
100
70 mm FTR 3.206.070 1288 / Filter discs.
100
90 mm FTR 3.206.090 1288 / Filter discs.
100
110 mm FTR 3.206.110 1288 / Filter discs.
100
125 mm FTR 3.206.125 1288 / Filter discs.
100
150 mm FTR 3.206.150 1288 / Filter discs.
100
185 mm FTR 3.206.185 1288 / Filter discs.
100
240 mm FTR 3.206.240 1288 / Filter discs.
100
Grade 1289 - plain, medium wide pores, medium fast
commonly used grade for analytical work, coarser precipitates like
sulphides of silver, arsenic, antimony, cadmium, lead, iron and magnes,;
lead chromate, ammonium molybdate, alkaline earth carbonates etc.
Basis weight
84 g/m
2
Filtration velocity:
10 ml / 20 seconds
Typical pore size:
8 - 12 µm
Similar to:
S&S 597, M-N 616
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.207.055 1289 / Filter discs.
100
70 mm FTR 3.207.070 1289 / Filter discs.
100
90 mm FTR 3.207.090 1289 / Filter discs.
100
110 mm FTR 3.207.110 1289 / Filter discs.
100
125 mm FTR 3.207.125 1289 / Filter discs.
100
150 mm FTR 3.207.150 1289 / Filter discs.
100
185 mm FTR 3.207.185 1289 / Filter discs.
100
240 mm FTR 3.207.240 1289 / Filter discs.
100
Grade 1291 - fine pored, very dense, very low rate of filtration
fine-grained precipitates cold-precipitated barium sulphate, meta-stannic
acid
Basis weight
84 g/m
2
Filtration velocity:
10 ml / 180 seconds
Typical pore size:
2 - 3 µm
Similar to:
S&S 602 h, M-N 619 de
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.209.055 1291 / Filter discs.
100
70 mm FTR 3.209.070 1291 / Filter discs.
100
90 mm FTR 3.209.090 1291 / Filter discs.
100
110 mm FTR 3.209.110 1291 / Filter discs.
100
125 mm FTR 3.209.125 1291 / Filter discs.
100
150 mm FTR 3.209.150 1291 / Filter discs.
100
185 mm FTR 3.209.185 1291 / Filter discs.
100
240 mm FTR 3.209.240 1291 / Filter discs.
100
148
FILTER PAPERS