Laboratory Filter Paper
The
filter papers produced by Hawach
laboratory filter paper manufacturer
are divided into two series, qualitative filter paper, and quantitative filter paper. Qualitative filter papers are divided into standard grades and wet strengthened grades. Wet strengthened grades are added a small amount of chemical stabilizer on the basis of the standard grades. Qualitative filter paper ash content is less than 0.1%, and quantitative filter paper ash content is less than 0.007%. Ash content is the biggest difference between qualitative filter paper chemistry lab and quantitative filter paper. As a
filter paper manufacturers
, Hawach has disc and sheet type, regular or customized size, and shape are all available.
Grade comparison provided by laboratory filter paper manufacturer
Qualitative Filter Paper
Hawach | BIO-1 | BIO-2 | BIO-4 | BIO-5 | BIO-6 |
Whatman | Grade 1 | Grade 2 | Grade 4 | Grade 5 | Grade 6 |
Advantec | 2 | 232 | 1 | 235 | 131 |
Munktell | No.1/1F | No.2/150 | 1288/3 | 293/120H | 1290/1001 |
Ahlstrom | 601 | 642 | 631 | 610 | 950 |
Macherey Nagel | 616 | 616md | 1670 | 619eh | 619eh |
Wet Strengthened Grades
Hawach | BIO-91 | BIO-113 |
Whatman | Grade 91 | Grade 113 |
Advantec | n/a | n/a |
Munktell | 55/N | 6 S/N |
Ahlstrom | 615 | n/a |
Macherey Nagel | n/a | n/a |
Quantitative Filter Paper
Hawach | BIO-40 | BIO-41 | BIO-42 | BIO-43 | BIO-44 |
Whatman | Grade 40 | Grade 41 | Grade 42 | Grade 43 | Grade 44 |
Advantec | No. 5B | 7 | 5C | – | 6/4A |
Munktell | 390 | 00M/389 | 393/00H | 392/00A | 391 |
Ahlstrom | 74 | – | 94 | 75 | 95 |
Macherey Nagel | 640d | 640m | 640de | 640md | 640de |