The Basic Fusing and Slumping Process

The basic fusing and slumping process has five main stages.

All are important to successfully fire your glass.

Make sure to use the appropriate firing schedule to avoid unwanted cracks like these.

The basic fusing and slumping process has five main stages:

  • Heating phase – where the temperature increases from room temperature to the temperature where fusing and slumping takes place

  • Bubble soak phase – where the temperature is maintained at a given point for a period of time to minimize trapped air bubbles in the finished piece

  • Cooling phase – when the temperature falls from its highest point to just above the annealing range

  • Annealing phase – the critical step that relieves the stress in the glass

  • Cool to room temperature phase – where the glass gradually becomes cool enough to touch