Bottle slumps are bottles that have been heated in a kiln to make new objects such as tea light holders (as pictured), cheese trays, and cutting boards etc. You can use any different bottle (including those with painted labels) to do so. However, here are some instructions on how to do it.
1) Remove the label from the bottle- it is best if the glue has also gone if possible.
2) Wash and DRY your bottle completely effectively- moisture can make the bottle explode!
3) Devitrification spay CAN be applied to the bottle to prevent a hazy or scummy appearance on the bottle after its been fired.
4) If you would like to hang your bottle or you are making wind chimes; take a piece of 20 gage copper wire shaped in a U and insert it in the bottle top before slumping.5) Use a mold that has been pre treated with glass separator and again dried completely. Separator should be reapplied between firings as needed. Check the vent holes to be sure that they are not plugged with the separator.
6) 600 DPH (degrees per hr), to 1100 DF, soak (hold temp) for 10 minutes.
Heat 300 DPH to 1300 hold for 30 minutes this will help eliminate the air bubble that would get trapped at a faster slumping schedule.
Heat AFAP (as fast as possible), to 1425 DF, (depending on the size and thickness of your bottle) soak for 5-15 minutes or until the bottle is slumped to perfection.
(watch it closely during this time it can move rather fast!)
Cool AFAP by flash venting the kiln; continue to open and close the lid for a few seconds to allow the heat to escape\until the temperature falls to 1000 DF.
(watch it closely during this time it can move rather fast!)
Cool AFAP by flash venting the kiln; continue to open and close the lid for a few seconds to allow the heat to escape\until the temperature falls to 1000 DF.
Soak for 10 minutes at 1000 DF.
Annealing Stage; slow cool 180 DPH to 800 DF.
Next turn off the kiln and let it cool naturally to room temperature; don't peek!
After you remove your project from the kiln; be sure to vacuum any spall from the copper wire to avoid contaminating your next project.
You may want to adjust the temperature and/or soak time according to the size and thickness of your bottle.
Don’t become discouraged trial and error is the best teacher and sometimes the result of what will be some of your favorite pieces.
Here are some more examples of work.













