08 TECHNICAL INFORMATION | PRODUCT-SPECIFIC SECTION
different variants depending on requirements and complies with DURAN® quality requirements, as there isno restriction of the product properties. New, innovative technology also enables the labelling of small batches. Laser marking The laser marking is burnt into the label field and does not interact with the glass due to the wavelength used. Only the screen-printing ink is removed so that the glass surface remains undamaged. The tried-and-tested DURAN® glass properties such as high continuous usage temperature, resistance to temperature change and chemical resistance remain unchanged. The use of the latest laser technology produces good print quality and therefore good legibility. The lasered DURAN® glass articles are still autoclavable/sterilisable and also microwave and dishwasher-safe.
BOTTLES
Laboratory bottles
DURAN® laboratory bottles are chemically resistant and stable. The extensive range of original accessories includes screw caps for the widest possible range of applications. Alongside the standard PP screw cap for everyday laboratory use, further caps made from various plastics and having special properties are available. DURAN® laboratory bottles are completed by suitable pouring rings from different plastics, which enable drip-free working. As almost all GL 45 bottles of 100ml capacity and above use the same thread size, screw caps and pouring rings are fully interchangeable. The bottles, pouring rings and caps are autoclavable/ sterilisable.
Properties Light protection • Amber bottles are opaque up to 500nm
• Plastic coated bottles are opaque up to 380nm • Application: storage of light sensitive substances
High thermal shock resistance Due to their temperature properties, the bottles are suitable for autoclaving and sterilising (see general section). Because of the bottom geometry and the wall thickness, direct heating with an unshielded flame is not recommended. When using an electronic heating plate or water bath laboratory bottles should be heated gradually.
Recommendations Pressure resistance
DURAN® laboratory bottles are, with the exception of the pressure-resistant DURAN® pressure plus+ bottles, in general not suitable for use under pressure or in a vacuum. DURAN® pressure plus+ bottles are pressure resistant from – 1 to + 1.5 bar (overpressure) due to a modified geometry and increased wall thickness. Sterilisation When sterilising or autoclaving contents, the screw cap must only be loosely fitted (max. one turn). The contents may expand or boil causing a large pressure difference in a closed vessel, which may well result in explosive failure. Alternatively, a DURAN® membrane cap may be used. Pressure equalisation takes place through the PTFE membrane, while at the same time the membrane cap can remain tightly closed, greatly reducing the risk of contamination. See also general section. Cleaning Cleaning should be carried out manually in a soaking bath or automatically in a dishwasher (see general section). When cleaning in a dishwasher, load so that there is no glass-to-glass contact (especially the threads) to avoid chips or abrasions.
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