Filter Paper Class 3

Filter Paper Class 3 – Coarse, Fast-Flow Laboratory Filter Paper

Filter Paper Class 3 is a coarse, fast-flow filtration paper designed for applications that require rapid liquid flow and efficient separation of larger particles. Produced from high-grade cotton linters enriched with alpha cellulose, this filter paper delivers dependable mechanical strength, stable flow rates, and excellent handling during high-volume or routine laboratory work.

With its higher porosity and 20–25 micron particle retention, Class 3 is ideal for laboratories needing quick filtration while maintaining clarity and consistency.

Available Sizes

90mm • 110mm • 125mm • 150mm • 240mm

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Key Features

• Fast-flow, coarse filtration for high-throughput applications

• Made from purified cellulose fibers for structural strength

• Approx. 0.13% ash content, suitable for qualitative analysis

• High porosity ensures rapid liquid movement

• Reliable sheet strength, even when wet

• Suitable for both standalone and repeated filtration cycles

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Best Uses for Class 3

Class 3 filter paper is designed for situations where speed and volume matter more than fine particle retention. It performs exceptionally well in:

• Rapid qualitative filtration

• Removal of coarse precipitates and particles

• Sample clarification prior to further processing

• Mining and metallurgical sample preparation

• Routine QC and field-lab applications

• Pre-filtration before fine or ashless papers

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Why Choose FilterLab Class 3?

FilterLab Class 3 offers a sturdy, fast-working filtration solution that handles larger particles with ease. Its composition—high alpha-cellulose content with a controlled ash level of 0.13%—ensures performance consistency and reliability.

FilterLab produces a full range of filtration grades and classes, including Class 1, Class 2, Class 4, and ashless Class 40/41, to match both qualitative and quantitative analysis needs.

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Delivery

We deliver across Johannesburg, including Pretoria, Vereeniging, East Rand, South Rand, West Rand, and provide nationwide courier delivery throughout South Africa.