Initial kiln setup. A glass square is first fully fused and cooled, then placed in the kiln for slumping. The glass is 1/4" thick, and placed shiny side up.

(This is actually a different piece then in the photos below.)

You have to watch carefully while you do this. Find a temperature where the glass just starts to droop. Pick a temperature, like 1050F and hold for 15 min. Keep adding 50 Degrees F, until you see movement. Then, hold it there, and keep checking until it has folded to the degree you want.

The specific temperature will depend on the type of glass, the color, the size and thickness, and the particular kiln.

I don't remember what temperature I used in this tutorial, but with Bullseye glass, I'd start at 1050-1100F.

Note how glass slumps and folds during the heating process

Make sure to stop the slumping process before the tips of the glass touch the kiln shelf.

Example of a finished vase.