Product Details
Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers in the depth of the media and are used in methods requiring determination and identification of particulate in both liquids and gases. This natural fiber filter paper clarifies liquid samples and is more convenient than flat filters when used in a filter funnel, reducing preparation time due to its sharply creased prefolded pattern. It is widely used for general laboratory separation, clarification applications, and soil analysis methods. Quantitative cellulose filter papers, primarily used in gravimetric analysis, also entrap particulate within the cellulose fiber matrix and prepare samples for further testing with various instrumentation. These high-quality papers are made from refined pulp and alpha linters, are acid washed, and have an extremely low ash content, determined by dry method exposure at 900°C in a muffle furnace. Key terms include filter media nomenclature that is serialized without grade indication, furnish referring to raw materials in manufacturing, retention as nominal particulate retention at 98% efficiency in liquid, flow as liquid flow rate relative to comparable products, basis weight as nominal weight per meter squared (gram weight) at 8% moisture, and thickness measured under 4 psi using TAPPI method T411. The papers come in flat or fluted formats, with flat supplied as sheets, rolls, or die-cut parts, and fluted in 1/4 or 1/2 quadrant funnel folding. The product includes warranty information consistent with standard terms.
