pressed glass

[Anonymous]

First piece was 14 inches across using 96 COE and the second piece was slightly small starting at 12 inches across and using 90 COE glass  Both time I placed Two layers of glass on top in a # of different colors but was carful to only use glass of the same COE.  My kiln is a Paragon 10.  I used the schedule that was on this web site.  I has used it before for small coasters and it worked well but this time the first on popped into 3 pieces after we sandlasted it and the second one poped in the Kiln.  I am now wondering if I am working to large. I was hopeing to make a 18 inch bowl. Looking forward to your advice.  thanks

11 sisters