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Typical properties
| Typical particle retention in liquid (µm)¹ |
12-25 |
| Filtration speed (approx) herzberg (s) |
25 |
| Nominal ash content (%)³ |
0.01 |
| Nominal air flow (s/100 mL/in²) |
- |
| Nominal thickness (µm) |
190 |
| Nominal basis weight (g/m²) |
80 |
| Typical water flow rate (mL/min)² |
- |
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Ordering information – quantitative filter papers – ashless grades
| Dimensions (mm) |
Catalog number |
Quantity/Pack |
| 90 |
10300009 |
100 |
| 110 |
10300010 |
100 |
| 125 |
10300011 |
100 |
| 150 |
10300012 |
100 |
| 185 |
10300014 |
100 |
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Ordering information – quantitative filter papers – ashless folded (prepleated) grades
| Dimensions (mm) |
Catalog number |
Quantity/Pack |
| 150 |
10300045 |
100 |
Grade 589/1: 12-25 μm (fast filter paper)
‘Black Ribbon Filter’, the established standard in quantitative analysis for the filtration of coarse precipitates (class 2a acc. to DIN 53 135). Ashless filter paper with very high flow rate. Used for many quantitative standard methods, especially for gravimetric applications (e.g., determination of the ash content in foodstuffs), or for the Blaine test in the cement industry.
With less than 0.01% ash, GE’s Whatman Grade 589/1 filter papers can be used for the Blaine test in the cement industry and as an ash content test filter for foodstuffs.
