Fusing was the primary method of making small glass objects for approximately 2,000 years .While glass working in general enjoyed a revival during the Renaissance, fusing was largely ignored during this period.

Fusing began to regain popularity in the early part of the 20th century, particularly in the U.S. during the 1960s.

Modern glass fusing is a widespread hobby but the technique is also gaining popularity in the world of fine art.

Fused glass is glass that has been fired (heat-processed) in a kiln at a range of high temperatures from 593 C (1,099 F) to 816 C (1,501 F). There are 3 main distinctions for temperature application and the resulting effect on the glass.

Firing in the lower ranges of these temperatures 593677 C (1,0991,251 F) is called slumping.

Firing in the middle ranges of these temperatures 677732 C (1,2511,350 F) is considered "tack fusing". Firing the glass at the higher spectrum of this range 732816 C (1,3501,501 F) is a "full fuse". All of these techniques can be applied to one glass work in separate firings to add depth, relief and shape