What is Boro 3.3 glass?
The abbreviation Boro 3.3 stands for a borosilicate glass type 3.3 as specified in international standard DIN ISO 3585, for applications requiring very good chemical and thermal resistance (including resistance to thermal shock), and high mechanical stability. Typical applications are components for chemical apparatus, round-bottom flasks, and beakers.
How should I clean my volumetric glassware?
For increased service life it is recommended that you clean your volumetric instruments with:
- No mechanical abrasion
- Low alkaline detergents
- Low temperature: < 70°C
- Short duration: < 20 minutes
What kind of screening ink is used for printing the volumetric glassware?
Blue and white enamel are printed on the outer surface and provide a high contrast and an optimal combination of chemical resistance and legibility for the volumetric glassware.
How can the meniscus be easily read?
The volume of a concave meniscus has to be read at the lowest point of the liquid level. Here the lowest point of the meniscus has to touch the upper edge of the graduation mark. For parallax-free adjustment of the meniscus, the pipette is held upright and the observer’s eye must be at the same height as the meniscus. In this position the ring mark will appear as a line. If the background is light, a piece of dark paper held behind the instrument immediately beneath the ring or graduation mark will make the meniscus appear darker and more easily readable.