We do not offer international shipping to countries within the European Union
We can only ship non-hazardous products to Rest of World
Compare all Pack Sizes
Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.
We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.
AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE
Standard Qualitative Filter Papers are used for low gravity, or quadrant-folded applications. They have a higher level of α- cellulose than other filter papers. This means that they will weaken when the papers are introduced to water. We do not recommend Standard Qualitative Filter Papers if wet handling or vacuum work is necessary. In routine quadrant-folded applications the underlying strength of standard (untreated) grades does not present an issue.
Grade 303 is a medium-filtering qualitative paper with a larger pore size and higher absorbency than Grade 301. It is commonly used in general laboratory filtration and is also widely employed in agricultural and environmental testing. Typical applications include plant growth trials, soil testing, and air analysis for monitoring specific contaminants, as well as the filtration of organic and sulphide precipitates.
Application: Soil Testing, Air Analysis, Organic and Sulphide Precipitate Filtration
Qualitative Analysis:
Designed for procedures focused on identifying the presence of materials in samples.
Higher Absorbency:
Absorbs more liquid than Grade 301, supporting a wider range of filtration tasks.
Larger Pore Size:
Offers moderate retention of fine particles with improved flow characteristics.
Environmental & Agricultural Use:
Commonly used for plant growth trials, soil quality monitoring, and contaminant tracking in air samples.
Versatile Laboratory Filtration:
Suitable for general lab work and applications involving organic or sulphide precipitates.
Available Grades
| Grade | Whatman Equivalent | Speed | Thickness (mm) | Pore Size (μM) | Weight (g/m²) | Filtration Speed (sec*) | Burst Strength (kg/cm²) |
|---|---|---|---|---|---|---|---|
| 301 | = No.5 | Very Slow Filtering | 0.14 | 2-3 | 84 | 180 | > 0.30 |
| 302 | = No.3 | Medium Filtering | 0.3 | 12-16 | 150 | 65 | 3.90 |
| 303 | = No.2 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 304 | = No.1 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 305 | = No.4 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
Pack Size:
Price: £
Quantity:
| Code | Pack | Price | Qty | |||
|---|---|---|---|---|---|---|
| 303055 | 55mm x 100 Pack | £7.34 | | |||
| 303070 | 70mm x 100 Pack | £7.66 | | |||
| 303090 | 90mm x 100 Pack | £8.41 | | |||
| 303110 | 110mm x 100 Pack | £9.12 | | |||
| 303125 | 125mm x 100 Pack | £10.03 | | |||
| 303150 | 150mm x 100 Pack | £11.30 | | |||
| 303185 | 185mm x 100 Pack | £13.40 | | |||
| 303240 | 240mm x 100 Pack | £18.45 | | |||
| 303300 | 300mm x 100 Pack | £24.99 | | |||
| 303320 | 320mm x 100 Pack | £36.66 | | |||
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