Whatman Grade No. 5 Filter Paper Whatman. The basis for the speciality of Whatman Grade No. 5 Filter Paper is its remarkable efficiency on diluted starting materials. The basis also provides an excellent ability to retain a high percentage of aqueous solutions and to a lesser extent gases and liquids. The basis also combines outstanding strength with outstanding flow characteristics. Its great strength comes from the special coating process which enhances flow and eliminates or reduces the clogging of the filter paper with additives such as wax gum arabic and soft paraffin. It is especially suited for the filtration of coarse solids from screening and centrifugal pumping processes as the paper gains greater porosity and flows more readily through the filter. Grading for Whatman Grade No. 5 Filter Paper is based on tests carried out by the Institute of Heraldic Sciences and Technology (IHAM) under the jurisdiction of the Institute of Chemical Sciences at the University of London. Specifications for Whatman Grade No. 5 Filter Paper Whatman 1005-185 : Diameter cm: 18.5 Whatman No.: 1005-185 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. In addition to the Whatman Grade No. 5 Filter Paper Whatman 1005-185/ 28462-148 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 1005-185