- Industrial & Custom Kilns
The process with glass slumping is similar to glass fusing but it does not require as much heat. During the heating phase glass is brought slowly up to around 1000 deg f. At this temperature the glass begins to soften and the edges will begin to glow. At around 1200-13000 deg. f. the glass will take the shape of your mold and the pieces, if any, will begin to stick together.