Firing Schedule for Inclusions – Bubble Squeeze

Firing Schedule for Inclusions/Bubble Squeeze

Firing with Inclusions requires you to adjust your firing schedule.  By slowing down the ramp rates and adding a hold in the slumping range, you can accomplish a ‘bubble squeeze’ and encourage the air to escape as the glass fuses.  Here is an adjusted fusing schedule for example:

Ramp Rate (F) Hold Temp (F) Hold Time
300/hr 500 15 min
250 1300 10 min – 40 min Bubble Squeeze Hold
200 1550 8 min
9999/hr 1060 45 min
50/hr 940 0
100/hr 740 0
off to room temp

This is a sample firing schedule for float glass, it WILL NEED TO BE TESTED AND ADJUSTED!  There are many variables that will effect your firing success, including glass thickness, inclusion thickness, kiln size, etc.  I’m always happy to help with adjustments, give this schedule a try, then send me photos via the contact form and I can offer suggestions.

Some examples of projects using this firing schedule:

Bottle Glass Fish Sun Charm

What’s a Sun Charm?  A little something that’s more than a sun catcher, but not quite a wind chime.  I was in the mood to do some fusing and also use up a bunch of my jewelry making stash, so here we go!  Materials: Fused Bottle Glass Fish Jump Rings Split Rings...
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Lentil Bead Molds – Instructions

Lentil Bead Molds – Instructions Materials needed: Lentil Bead Mold (any size, or ALL the sizes for extra fun) Kiln Wash Glass frit Step 1. Prepare the mandrels. Each bead kit ships with a dozen mandrels and a tube of bead release, so you’re all set to go when your...
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Shelf Paper Burnout Time Lapse

If you’ve ever wondered why your shelf paper smells when you fire it, you are in luck!  We’ve made a time lapse video showing the organic binder burning out of the shelf paper as it fires.  Notice how the paper turns black and then white again, when the paper is white...
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