Whatman™ Shark Skin™ Grade General Purpose Filters
By Schleicher & Schuell
Whatman™ filter papers are made from super-refined cellulose and designed to have particular properties for each technical application. The Shark Skin® grade filters are creped, medium to slow speed, with high wet strength. Recommended for general filtration and for high volume process filtration. Resistant to weak acids and alkalies. Available in circles, sheets, and rolls.
Technical Data on Schleicher & Schuell Filter Paper:
| Grade | Weight | Thickness | Precipitate Retention Range | Filtration Speed1 | Wet Strength |
| Quantitative Low Ash | |||||
| 589 Black Ribbon | 76g/m2 | 0.21mm | 20-30µm | 12 sec | 5.1 psi |
| 589 White Ribbon | 87 | 0.21 | 8-12 | 34 | 5.5 |
| 589 Blue Ribbon | 90 | 0.19 | 2-5 | 150 | 3.6 |
| Qualitative Low Ash | |||||
| 604 | 75g/m2 | 0.20mm | 20-30µm | 12 sec | 7.0 psi |
| 597 | 90 | 0.21 | 8-12 | 38 | 5.2 |
| 576 | 92 | 0.14 | 2-5 | 392 | 76 |
| General Purpose | |||||
| Shark Skin® | 44g/m2 | 0.17mm | 8-12µm | 19 sec | 80 psi |
| Pre-Pleated | |||||
| 588 | 81g/m2 | 0.21mm | 20-30µm | 6 sec | 41 psi |
1Liquid Filtration Speed is the average time in seconds for 10mL of distilled water to pass through an 11cm quadrant folded, free hanging cone. ASTM method E832-9.3.