Description
Round filter 70 mm grade (5) is a slow-filtering, dense circular laboratory filter paper for fine particle retention. The 70 mm diameter sheets support clarifying filtrations and collection of fine precipitates where a tight paper structure is preferred over high flow rate. Each pack contains 100 pieces, giving laboratories practical stock for routine analytical and preparative work. These round filters from manufacturer Witeg carry the grade designation (5), matching the slow, dense filtration behaviour stated for this type. The pack has a net weight of 0,045 kg and is ready for use in standard filter holders and funnels that accept the 70 mm format. Dense slow filters of this kind are selected when filtrate clarity and retention of fine solids matter more than speed. They suit everyday chemistry, quality-control, and teaching-lab steps that call for careful separation rather than rapid throughput. Consistent circular cut and the defined 70 mm diameter help ensure a reliable fit in matching apparatus across repeated preparations and parallel sample series.
This article is part of Filter paper, in Filtration.
Key features
- Pack size: 100 pc(s)
- Density: dense
- Product type: Round filter
- Filter diameter: 70 mm
- Grade: (5)
- Filtration speed: slow
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Questions about Round filter 70mm
What is this article?
Round filter 70mm 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.