Whatman Grade No. 5 Filter Paper Whatman. 5 Filter Paper is most commonly used in the separation of solids from water in both coarse and fine filter presses. Grading is based on weight of the solids removed; if paper becomes darker or lighter during the rinsing process the color of the paper is also changed. The advantages of this method of separating solids from water are that the paper becomes less soluble in acidic or alkaline solutions and does not change the rheology of the water. This grade of paper can also be used for the clarification of sewage and sludges from sludge dilution systems. The paper does not support the weight of the paper in binder form but this quality of paper does provide the paper with a useful charring surface. Whatman Grade No. 5 Paper may also be used for the clarification of air through activated carbon and for the polishing of stainless steel and aluminium. Specifications for Whatman Grade No. 5 Filter Paper Whatman 1005-090 : Diameter cm: 9.0 Whatman No.: 1005-090 Unit: Pack of 100 Porosity: Fine Flow Rate: Slow Particle Retention: 2.5 m (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Whatman products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Filters with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Whatman Filters. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Whatman Grade No. 5 Filter Paper Whatman 1005-090/ 28462-069 we carry a full complement of Filters as well as other product offerings from Whatman. We also carry a full line of Whatman accessories to help meet your laboratory and scientific needs. For a complete selection of Whatman Filters please visit our Whatman page. For more brand name Filters please visit our Filters store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Whatman Grade No. 5 Filter Paper Whatman 1005-090