Kiln formed glass goes through a number of stages during the glass fusing cycle.
These glass fusing stages are very important when fusing and slumping fused art glass.
Fusing is a process where compatible pieces of glass are heated in a controlled environment until they fuse together.
In this case glass is heated and cooled in a controlled manner in a glass fusing kiln.
It can take many hours for large items to reach glass fusing temperature and many hours to cool down.
Heating and cooling is dependent upon the glass thickness and number of layers.
There are a large range of firing schedules devised to cater for the size and thickness of the projects involved.