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Thumbnail Filmstrip of Qualitative Filter Paper, Grade 04, Very Fast, 15-20um Retention, 70mm Circle, 100/Pk Images
Featuring a refined cellulose medium made from pure pulp and cotton linters with an alpha-cellulose content of nearly 100 percent, this Grade 04 qualitative filter paper disc measures 70mm in diameter and delivers a very fast flow rate with a nominal particle retention range of 15 to 20 microns. The low ash content of less than 0.06 percent supports clean filtrates in routine qualitative work, and the very fast filtration speed makes the paper well suited to high-throughput clarification and coarse precipitate removal.
Key Cellulose Filter Paper Characteristics
- Refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100 percent for consistent, naturally absorbent performance.
- Nominal particle retention of 15 to 20 microns, ideal for coarse and gelatinous precipitates rather than fine particle capture.
- Very fast flow rate that maximizes throughput in routine, less critical analyses.
- Low ash content of less than 0.06 percent that minimizes contamination of the filtrate.
- Enhanced mechanical strength for reliable handling in funnels and routine bench filtration.
Key Construction Characteristics
- Cellulose construction in a 70mm circular disc format.
- Qualitative grade (Grade 04) optimized for general laboratory filtration.
- Nonsterile, supplied in a pack of 100 discs.
This filter paper provides dependable, repeatable clarification across routine workflows while preserving sample integrity through its low ash, high purity cellulose structure. Its very fast flow rate and coarse retention make it a practical choice for separating bulky precipitates and clarifying liquids where fine particle capture is not required.
- Color
- White
- Diameter
- 70mm
- Flow Speed
- Very Fast
- Grade
- Qualitative
- Material
- Cellulose
- Mesh Format
- Circle
- Nominal Ash Content (%)
- 0.06
- Pack Count
- 100
- Particle Retention
- 15-20
- Pore Size (µm)
- 20
- Qualitative/ Quantitative
- Qualitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Coarse Precipitate Removal Captures coarse and gelatinous precipitates such as iron hydroxide, aluminium hydroxide, and chromium hydroxide during qualitative analysis.
- Routine Liquid Clarification Quickly clarifies liquids in general laboratory work thanks to its very fast flow rate.
- Biological Fluid Clean-Up Supports routine clean-up of biological fluids and organic extracts prior to further handling.
- Food Analysis Separates solid foodstuffs from associated liquids in routine food testing procedures.
- Air Pollution Monitoring Suitable for monitoring of air pollution when the collection of fine particles is not critical.
- Silica Determination Used in silica determination during steel and iron analysis where coarse retention is acceptable.