Niellin

Niellin is a type of glass that is known for its exceptional clarity and optical properties. It is a form of soda-lime glass that has been heat-treated to reduce internal stresses, resulting in a glass that is highly transparent and free from internal bubbles or inclusions. This process, known as annealing, involves slowly cooling the glass to relieve any residual stresses that may have formed during the manufacturing process.

Niellin glass is often used in applications where high optical quality is required, such as in the production of lenses, prisms, and other optical components. Its clarity and optical properties make it a popular choice for scientific instruments, telescopes, and other precision optical devices. Additionally, Niellin glass is also used in the production of high-quality glassware, such as laboratory equipment and decorative items.

The term "Niellin" is derived from the name of the French glassmaker, Louis Niell, who developed the process of annealing glass in the 19th century. Niell's innovations in glass manufacturing led to the creation of a new type of glass that was both highly transparent and durable, making it an essential material in many scientific and industrial applications. Today, Niellin glass continues to be used in a wide range of applications, from scientific research to everyday consumer products.