Drop out ring notes

Picture of a drop out ring mold.

Picture of a drop out ring mold supported with shelf posts.

Picture showing glass in a kiln, melting through the bottom of a drop out ring mold.  Picture from the Slumpy's webpage. 

Picture showing completed glass art piece from the Delphi webpage.   A square drop out ring was used.

This is a great reference guide for any glass artist trying to make a fused glass vase using a drop out ring mold.  Keep in mind that all kilns are different and that you may have to adjust your hold time depending on a few variables as discussed below.

Drop out ring notes:

Two layers of 3mm tick glass is enough for a 4" drop.

For every additional 2" drop, you need to add another layer of 3mm thick glass.   

For a 6" drop vase, you need 3 layers of 3mm thick glass fused together for a total of 9mm of glass.

For an 8" drop, you will need four layers of 3mm thick glass for a total of 12mm of glass.


Slump at 1250 degrees Fahrenheit and hold for about 60 minutes.
The wider the drop ring opening, you need to use a lower temperature and/or less hold time.  You will also need to adjust temperature and/or hold time when using more layers of glass.