: porous unsized paper used especially for filtering
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Whereas regular blood tests are drawn directly from athletes, DBS testing is a process in which drops of blood from small skin pricks are dried on filter paper and shipped to labs for remote analysis.—Matt Moret, New York Times, 3 Apr. 2026 Area monitors suck particulate emitted by power plants onto filter paper, which can be analyzed to see whether or not there has been an uncontrolled release of radiation.—Chris Baraniuk, Wired News, 15 Dec. 2025 The aircraft is equipped with external flow-through devices to collect particulates on filter paper and a compressor system for whole air samples collected in holding spheres.—Ryan Chan, MSNBC Newsweek, 5 Dec. 2025 Han was accused of smuggling in filter paper containing plasmids on Sept. 23 and March 5 and petri dishes containg C. elegans with genetic modifications on Sept. 29, according to an information filed in court June 26.—Christina Hall, Freep.com, 19 Aug. 2025 See All Example Sentences for filter paper