What temperature should I use for slumping? | Bullseye

Glass for Art and Architecture

What temperature should I use for slumping?

Glass slumping is a fun and rewarding kilnforming technique used to make bowls, platters, plates and many other objects. Slumping projects will usually require relatively low temperatures and longer hold times in the kiln than many other types of kilnforming projects. The idea is to allow the glass to soften, then gently sink, or slump, into the mold.

There is no "one-size-fits-all" slumping temperature.  The temperature and firing schedule you use will be determined by the shape of the project and specific materials you're using.  We do have information available on various projects on our Methods & Ideas page.  Tipsheet 7: Platemaking Tips contains firing schedules for projects like plates and platters.  TechNote 4: Heat & Glass covers basic principles for slumping glass, and if you haven't yet, be sure to watch our video lesson Slumping Basics.

Ready to get started?  Bullseye also offers a variety of high quality slumping molds.

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Helpful Resources

Video lesson: Slumping Basics
Video lesson: Firing: Basic Applications
Recommended Annealing Cycle for Bullseye Glass
Tips for using Bullseye Slumping Molds


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