Bubble Squeeze in TAC firing schedule
- October 22, 2012 at 4:19 pm #9880SharonHHParticipant
I 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 #12726wordanaParticipantOctober 28, 2012 at 10:13 pm #12727Stephen RichardParticipant
If 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.
- You must be logged in to reply to this topic.