Description
PTFE watch glass, 20 mm, is a laboratory cover disc isostatically moulded from pure PTFE and intended primarily for covering beakers and similar open vessels. The pure PTFE construction is completely resistant and chemically inert, protecting contents from contamination while withstanding contact with aggressive chemicals that would attack conventional glass covers in some applications. It can be used up to 280 °C, aligning with the thermal working range of PTFE laboratory ware. FDA-compliant material selection supports use in regulated or quality-focused laboratory settings where inert polymer contact is preferred. Supplied as one piece from manufacturer Labbox, the 20 mm diameter suits small beakers, crucibles and narrow-mouth vessels in analytical, synthetic and sample-preparation work. Isostatic moulding produces a uniform, durable disc that retains shape under normal laboratory handling. The watch-glass format allows partial covering for evaporation control, splash reduction or temporary protection of samples without sealing the vessel. Lightweight PTFE construction simplifies placement and removal during multi-step procedures while maintaining chemical compatibility across a broad reagent spectrum.
This article is part of Watch glasses & crystallising dishes, in Dishes, crucibles & porcelain.
Key features
- Pack size: 1 pc
- Material: Pure PTFE
- Diameter: 20 mm
- Maximum temperature: 280 °C
- EAN: 8434868087903
- GTIN: 08434868087903
- Technical Information Sheet:
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Questions about Watch glass dish, PTFE, 20 mm
What is this article?
Watch glass dish, PTFE, 20 mm is the article on this page. Luminix Health distributes Labbox for laboratory use. It sits in Watch glasses & crystallising dishes, inside Dishes, crucibles & porcelain, in Labware.
A watch glass is a shallow curved cover or a dish for drying a few grams. A crystallising dish is the flatter, wider dish a solution is left in while a solid comes out. Neither is volumetric. Diameter is the specification.
A dish is an open vessel for drying, evaporating or holding a solid. Porcelain and glazed ceramic take a higher temperature than borosilicate glass, which is why a crucible, not a beaker, goes into a furnace. A watch glass covers, or holds a small amount for drying. A mortar is for grinding. The temperature and the chemical, not the shape alone, choose the material. Laboratory ware of this family is listed under ISO laboratory ware.
Which category should I open next?
The category is Dishes, crucibles & porcelain. The sub-category is Watch glasses & crystallising dishes. The catalogue is Labware.
Shelves beside this one are Crucibles, Trays, bowls & tubs, Mortars & pestles, Evaporating dishes and Dishes (other).
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.