postbrennende

Postbrennende, also known as post-burning, is a technique used in the production of glassware, particularly in the creation of glass bottles and jars. The process involves heating the glass to a temperature where it becomes malleable, then applying a flame to the surface to create a smooth, glossy finish. This technique is often used to create a distinctive, shiny appearance on the glass surface.

The term "postbrennende" originates from the German language, where "post" means "after" and "brennende" means "burning." The process is also known as flame polishing or flame finishing. It is typically used on the neck and shoulder of a glass bottle, as well as on the base of a jar, to create a smooth, even surface.

The postbrennende process involves several steps. First, the glass is heated to a temperature of around 800-900 degrees Celsius (1472-1652 degrees Fahrenheit). At this temperature, the glass becomes soft and malleable. Next, a flame is applied to the surface of the glass. The heat from the flame causes the glass to flow and smooth out any imperfections or irregularities. The flame is then moved around the surface of the glass to create a uniform, glossy finish.

Postbrennende is a traditional glassmaking technique that has been used for centuries. It is often used to create a distinctive, high-quality finish on glassware. The process requires skill and precision, as the glass must be heated to the correct temperature and the flame must be applied in the correct manner. Despite its complexity, postbrennende remains a popular technique among glassmakers and is often used to create unique, handcrafted glassware.