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Specialty Lab Supplies
Glass Fiber Discs
For method-specific prefiltration or testing. Confirm binders, thickness and sample compatibility.
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AZUR SYSTEMIllustration
LABORATORY / Specialty Lab Supplies
Laboratory Filter Paper
Choose thickness, flow grade and ash content around the method. Different grades are not interchangeable.
- Product type
- Specialty Lab Supplies
- Material options
- Cellulose
- Specifications
- Confirmed by model and process
Images and specifications refer to the indicated models. Contact us to confirm configuration and suitability.
Construction & operating principle
Laboratory filter paper separates precipitates from liquids through a cellulose-fibre network. Thickness, fibre arrangement and wet strength influence flow and retention. Qualitative work prioritises clarification and handling, while quantitative analysis also requires control of ash and mass background. Paper grades are not universal pore-size guarantees and should be matched to the precipitate and subsequent analytical procedure.
Typical uses
- Separation of precipitates after chemical reactions
- Gravity clarification of laboratory liquids
- Solid collection for quantitative analytical methods
Compare product approaches
| Selection factor | What to compare |
|---|---|
| Qualitative or quantitative | Ignition-based measurements need the appropriate ash specification rather than ordinary qualitative paper. |
| Flow and retention | Faster grades suit coarser precipitates; fine particles generally need a tighter structure. |
| Wet strength | Vacuum or prolonged wet use imposes additional mechanical requirements on paper and support. |
Selection information to confirm
| Category | Specialty Lab Supplies |
|---|---|
| Material options | Cellulose |
| Filtration objective | Define what to remove and what to retain |
| Rating / Dimensions | Confirm combinations against controlled model specifications |
| Flow / Temperature / Pressure | Specify normal and limiting operating conditions |
| Connections / Seals | Confirm installation interfaces and wetted materials |
| Cleaning / Validation | Confirm the service cycle and acceptance criteria |
These are selection inputs, not verified performance claims for a specific model.
Build a clear application brief
Use the worksheet to collect your operating conditions. Contact us for controlled datasheets, dimensional drawings or validation documents for a specific model.
Product selection worksheet · TXT ↓Request technical documents ↗Use & maintenance
- 01
Installation
Fit the paper to the funnel without obstructing drainage and leave adequate filling clearance.
- 02
Loading
Transfer steadily along a controlled path, keeping liquid below the edge to avoid bypass.
- 03
Post-treatment
Follow method-specific washing, drying and conditioning, including the blank contribution.
Product questions
Are grade numbers interchangeable across brands?
Grading conventions can differ; compare application, retention and ash information.
Can paper replace a sterilising membrane?
Ordinary filter paper mainly separates solids and does not establish a validated microbial barrier.
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