Product Details
Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers within the depth of the media and are widely used in methods requiring determination and identification of particulate in both liquids and gas, as well as for clarifying liquid samples. These natural fiber filter papers are easier to use and more convenient than flat filters when used in a filter funnel due to their sharply creased prefolded pattern, reducing preparation time. They are widely used for general laboratory separation, clarification applications, and soil analysis methods. Quantitative cellulose filter papers are primarily used in gravimetric analysis procedures, performing separations by entrapping particulate within the cellulose fiber matrix and are also used to prepare samples for further testing with various types of instrumentation. These high-quality papers are manufactured from refined pulp and alpha linters, acid washed, and have an extremely low ash content. The filter media nomenclature is serialized without grade or quality indication; furnish refers to the raw materials used in wet laid product manufacture; ash content is determined by a dry method in exposure at 900°C in a muffle furnace; retention indicates nominal retention of particulate at 98% efficiency in liquid; flow refers to liquid flow rate speed relative to comparable products; basis weight is the nominal weight of material per m² at 8% moisture; thickness is measured under 4 psi using TAPPI Method T411; and available formats include flat stock supplied as sheets, rolls, or die-cut parts, and fluted options with 1/4 or 1/2 quadrant funnel folding.
