Circular Qualitative Filter Paper Medium Speed 100 Pack

Reliable and consistent, this Circular Qualitative Filter Paper (Medium Speed) is an essential tool for laboratory filtration tasks. Designed for general qualitative analysis, these circular filter papers offer dependable flow rates and effective particle retention — making them a go-to choice for science labs, schools, hobbyist chemistry setups, and home science experiments.

Each pack contains 100 sheets of round filter paper, crafted from high-quality cellulose for consistent results. The medium-speed grade balances filtration speed with reliable particle retention, suitable for a wide range of standard filtration applications.

Key Features

• Qualitative Grade: Ideal for standard laboratory and educational filtration applications
• Medium Speed: Balanced flow rate for efficient, reliable separation of particles from liquids
• Circular Shape: Fits standard funnel sizes; easy to fold and place into a lab funnel
• High-Quality Paper: Made from pure cellulose for consistent pore size and structural integrity
• Pack of 100: Generous quantity ensures you always have plenty on hand
• Multiple Size Options: Available in 4 size options to suit your specific funnel and application needs

Ideal For

• School and university chemistry labs
• General qualitative analysis and routine filtration
• Separating precipitates from solutions
• Homebrew, aquarium, and science hobby filtration projects
• Environmental sampling and field research

Product Details

• Material: Cellulose paper
• Shape: Circular
• Grade: Qualitative, Medium Speed
• Quantity: 100 pcs per pack
• Please Note: Due to hand measurement, there may be a size variance of approximately 1–2 cm. Colors shown in images may appear slightly different on screen.

For more information on laboratory filtration standards and best practices, visit the National Institute of Standards and Technology (NIST), a trusted resource for scientific measurement and laboratory standards.

Frequently Asked Questions

Q: What is qualitative filter paper used for?

A: Qualitative filter paper is used for general laboratory filtration tasks where chemical analysis of the paper itself is not required. It is ideal for separating solids from liquids, clarifying solutions, and routine educational or research lab work. This medium-speed grade is versatile enough for a broad range of standard applications.

Q: What does "medium speed" mean for filter paper?

A: "Medium speed" refers to the flow rate at which liquid passes through the filter paper. Medium-speed filter paper strikes a balance between fast filtration and effective particle retention — making it suitable for filtering moderately fine precipitates and general-purpose lab use where neither ultra-fast nor ultra-slow filtration is required.

Q: How do I use circular filter paper with a lab funnel?

A: Simply fold the circular filter paper in half, then fold it in half again to form a cone shape. Open one layer of the cone and place it inside a glass or plastic funnel. Moisten it slightly with distilled water to help it adhere, then pour your liquid mixture through. The paper will capture solid particles while the filtered liquid passes through into your collection vessel.

Q: Are these filter papers suitable for home or hobby use?

A: Yes! While these are laboratory-grade filter papers, they are perfectly suited for hobbyist science projects, home brewing, aquarium maintenance filtration experiments, or educational science kits. The pack of 100 ensures you have plenty for extended use.