Description
Round filter blue band (5) is a circular laboratory filter paper specified for slow, dense filtration, with a filter diameter of 90 mm. Blue band (5) media are chosen when fine particle retention and a controlled filtrate are more important than high flow rate. The pack comprises 100 pieces, supporting repeated use in analytical, preparative, and routine laboratory filtration. At 90 mm, the disc offers a larger working area than smaller formats while remaining compatible with standard funnels and holders for this size. The dense, slow-filtering character suits clarification of suspensions, collection of precipitates, and separation steps that need a tight paper grade. Available from manufacturer Witeg, these round filters integrate easily into everyday chemistry and life-science workflows. Pack net weight is 0,084 kg, convenient for shelf storage and bench restocking. Laboratories select this diameter when sample volume or funnel geometry calls for a 90 mm blue band disc without changing filtration grade or pack count.
This article is part of Filter paper, in Filtration.
Key features
- Pack size: 100 pc(s)
- Product type: Round filter
- Grade: Blue band (5)
- Filtration: Slow, dense
- Diameter: 90 mm
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Questions about Round filter 90mm
What is this article?
Round filter 90mm is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Filter paper, inside Filtration, in Lab consumables.
Filter paper is a cellulose sheet of a stated retention and speed. Qualitative paper clarifies. Quantitative, ashless paper is for a precipitate that will be weighed or ashed, because the paper itself leaves almost no ash. The diameter has to match the funnel.
Filtration holds back what is larger than the pores and lets the rest through. Paper is the ordinary laboratory filter. A membrane has a stated pore size and a polymer that must survive the solvent. A syringe filter is that membrane in a housing on a syringe. Glass fibre takes a higher dirt load. Ultrafiltration holds back macromolecules and passes salts. The pore size, the chemical compatibility and the volume are the three choices. Laboratory apparatus around filtration is indexed under ISO laboratory apparatus.
Which category should I open next?
The category is Filtration. The sub-category is Filter paper. The catalogue is Lab consumables.
Shelves beside this one are Sintered glass filter plates & discs, Syringe filters, Filter cartridges & capsules, Membrane filters, Glass & quartz fibre filters, Bottle-top & vacuum filtration units, Ultrafiltration & concentrators, Filtration accessories, Extraction thimbles and Dialysis tubing & devices.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.