Bubble Squeeze in TAC firing schedule
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- This topic has 2 replies, 3 voices, and was last updated 8 years, 5 months ago by
Stephen Richard.
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- October 22, 2012 at 4:19 pm #9880
SharonHH
ParticipantI have just made a tile using two 8″ pieces of thin black 96 glass.. I used these as a base for a decorating layer using white pieces. This was a flower using many small pieces covering about a thilrd of the base. I used The TAC pre-programmed schedule on my Deluxe 15-6 Kiln to fire it.
When fired, the black background has many small indentations – not really like bubbles- but maybe they are really air caught inbetween the layers. Maybe I should have added a bubble squeeze?
The schedule was
300 F/hour 1250F .30
400 F/hour 1310F .10
FULL 960F 1.00
100F/hour 800F .00
Where and how long should the bubble squeeze be?
Could there be another reason for this problem?
Thanks,
October 23, 2012 at 2:57 am #12726wordana
ParticipantLook at the bottom of this page for good info on a bubble squeeze.
http://system96.com/Pages/FiringGuideF.html
Dana W.
Jester’s Baubles Fused Glass Designs
October 28, 2012 at 10:13 pm #12727Stephen Richard
ParticipantIf you are firing Spectrum S96, even at 677C you are not really getting a proper tack fuse with only 30mins at the temperature. The bumps and indentations are probably a result of an incomplete adhesion of the glasses. Tack fuses normally occur in the 720-760C range.
Don’t rely on the pre-programmed schedules. Instead look at some of Paul’s here on the site.
Stephen Richard
blogs at: http://www.verrier-glass.blogspot.com/ and http://www.glasstips.blogspot.com/
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