Description

A cork stopper is a type of laboratory closure device made from cork, which is a natural and renewable material harvested from the bark of cork oak trees.

Cork stoppers are commonly used to seal glassware, such as flasks, bottles, and test tubes, in laboratory settings. They are preferred over other types of stoppers, such as rubber or plastic, because cork is inert, non-toxic, and has a low coefficient of thermal expansion, making it resistant to changes in temperature and pressure.

In addition to its chemical properties, cork is also highly compressible and elastic, allowing it to form a tight seal around the opening of the glassware, preventing contamination or loss of the contents.

Cork stoppers come in different shapes and sizes to fit a variety of glassware, and are often labeled with the size and type of cork, as well as the manufacturer’s logo or brand. They are also sometimes treated with paraffin or silicone oil to improve their sealing properties.

Overall, cork stoppers are a reliable and eco-friendly option for sealing laboratory glassware, and are widely used in various scientific disciplines, including chemistry, biology, and pharmaceutical research.