{"product_id":"qualitative-filter-paper-circles-94-mm-20-micron-set-of-3x100","title":"Qualitative Filter Paper Circles 94 mm - 20 Micron, Set of 3x100","description":"\u003cp\u003eIn this review of the qualitative filter paper circles, the bottom line is simple: these discs are aimed at labs, classrooms and hobbyists who need reliable, low-cost particle separation for routine qualitative work. The reviewer found the 94 mm diameter sheets provide consistent filtration for common tasks such as water testing and vacuum filtration in 10 cm Buchner funnels, and the standout reason to buy is the combination of coarse 20 micron retention and steady filtration speed that balances throughput with effective particle removal. The set of three boxes of 100 makes this a practical, value-oriented choice.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e94 mm Diameter:\u003c\/strong\u003e The paper fits most standard 10 cm Buchner funnels and provides a full-coverage disc for even filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 Micron Particle Retention:\u003c\/strong\u003e Coarse cellulose fibers reliably remove particles larger than 20 micron for general qualitative separations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltration Speed:\u003c\/strong\u003e With a reported 35 - 70 second range, the sheets offer a predictable balance between speed and clarity for routine lab tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial and Ash Content:\u003c\/strong\u003e Made from cellulose with low ash content (0.15%), the paper leaves minimal residue after drying and is suitable for many qualitative analyses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Size and Value:\u003c\/strong\u003e The set includes three boxes of 100 pieces, which makes it economical for repeated use over multiple experiments or classroom settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty and Support:\u003c\/strong\u003e The brand offers a 12 month limited warranty and customer service promise, providing recourse if any items arrive damaged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is best for small laboratories, educational institutions and hobbyists who perform routine qualitative filtration, such as water clarity checks, sample cleanup before analysis, or particulate removal from suspensions. The coarse 20 micron retention and medium filtration speed make these discs well suited to tasks where throughput and simplicity are more important than fine analytical separation.\u003c\/p\u003e\n\n\u003cp\u003eUsers who need absolute fine particle retention, specialized chemically resistant media, or certified quantitative filter paper for trace analysis should look elsewhere. For general-purpose filtration and workshops that require a steady supply of discs, this set offers clear practical value.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood value for bulk purchases with three boxes of 100 pieces each, reducing repeated reordering.\u003c\/li\u003e\n\u003cli\u003eConsistent filtration behavior reported by users, particularly effective in water filtration systems.\u003c\/li\u003e\n\u003cli\u003eLow ash content helps reduce residue after drying, useful for qualitative observations.\u003c\/li\u003e\n\u003cli\u003eFits common 10 cm Buchner funnels for many users, providing convenient compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users reported the discs can be slightly large for certain funnels, requiring slight trimming or adjustment.\u003c\/li\u003e\n\u003cli\u003eCoarse 20 micron retention is not suitable for applications that require fine particle capture or certified quantitative results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eQualitative filter paper circles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e94 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParticle Retention\u003c\/td\u003e\n\u003ctd\u003eApproximately 20 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltration Speed\u003c\/td\u003e\n\u003ctd\u003e35 - 70 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh Content\u003c\/td\u003e\n\u003ctd\u003e0.15%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e3 boxes x 100 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e12 months limited warranty and customer service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 94 mm qualitative filter paper circles deliver reliable, economical performance for general laboratory and classroom filtration tasks; they are a sensible buy for users who need coarse 20 micron retention, decent filtration speed, and low ash residue in bulk quantities. Those needing finer retention or specialized certifications should consider other media, but for routine qualitative work this set represents good value and dependable results.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these fit a 10 cm Buchner funnel?\u003c\/strong\u003e\u003cbr\u003eYes; the 94 mm diameter is reported to fit most 10 cm Buchner funnels, though a few users found the discs slightly large for specific funnel models.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat particle size do they retain?\u003c\/strong\u003e\u003cbr\u003eThese are coarse cellulose discs that generally retain particles larger than about 20 micron, suitable for routine qualitative separations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat happens if a box arrives damaged?\u003c\/strong\u003e\u003cbr\u003eThe brand provides a 12 month limited warranty and asks customers to contact support immediately so issues can be resolved.\u003c\/p\u003e","brand":"StonyLab Scientific","offers":[{"title":"Default Title","offer_id":48648327463131,"sku":"B0BG9XX9B6","price":37.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51jDzql_8YL._SL1500.jpg?v=1778539974","url":"https:\/\/gearmusthave.com\/products\/qualitative-filter-paper-circles-94-mm-20-micron-set-of-3x100","provider":"GearMustHave","version":"1.0","type":"link"}