Ahlstrom 6150-1500 Qualitative Filter Paper, Grade 615, 150 mm, 100/pk

Ahlstrom Grade 615 is ideal for general laboratory filtration and qualitative analysis, especially when filtering coarse precipitates such as metal hydroxides, ores, and construction-related samples. It is widely used in industrial labs, environmental testing, and routine filtration workflows.

This grade offers a particle retention of approximately 25 µm with a fast flow rate, allowing rapid filtration of larger particles without clogging. It is designed for high throughput when speed is more important than fine retention.

Grade 615 is considered an intermediate filter paper with a rough surface, positioned between coarser and finer grades. It provides a balance of high loading capacity and fast filtration, making it suitable for demanding applications where large volumes need to be processed quickly.

This filter paper is made from high-purity cellulose fibers (alpha-cellulose and linters), ensuring consistent performance, chemical resistance, and minimal contamination. This composition supports reliable results in routine laboratory and industrial filtration.

You should choose Grade 615 when you need fast filtration of coarse or gelatinous materials and want to avoid clogging. For finer particle retention or analytical precision, a slower grade would be more appropriate, but for speed and efficiency, Grade 615 is the better choice.