Standard Qualitative Filter Paper Grade 304
This grade covers a wide range of laboratory applications and is used for clarifying liquids and for rapid filtration of coarser precipitates such as lead sulfate, lead chromate, calcium oxalate, calcium carbonate, aluminum phosphate, barium carbonate and beryllium hydroxide. Grade 304 can be found in soil analysis, seed testing and in air pollution to collect dust-laden air and is also commonly used in the food industry to separate foodstuffs from the associated liquid of extracting liquid.
Description
| Product Code | Diameter (mm) | Johnson Grade | Speed Class | Thickness (mm) | Pore Size (μm) | Weight (g/m²) | Filtration Speed (sec*) | Burst Strength (Kg/cm²) |
| 304055 | 55 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304070 | 70 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304090 | 90 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304110 | 110 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304125 | 125 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304150 | 150 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304185 | 185 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304240 | 240 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304300 | 300 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 304320 | 320 | 304 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
