I have had my last two projects crack when I slumped them and am getting somewhat frustrated and need to find out why to avoid future problems.
The last project was made up of about 500 small dots that I made and tack fused together, then filled in around the dots with frit and did a full fuse of the whole piece.
After doing some cold work to smooth out the edges I put the round plate into a wave bowl mold to slup. The slumping program is as follows:
Segment 1 – 300/hr to 300 hold 10 miin
Segment 2 – 600/hr to 1225 hold 5 min
Segment 3 – 9999/hr to 950 hold 30 min
Segment 4 – 250/hr to 500 hold 10 min
Segment 5 – 9999/hr to 255 hold 0
Any suggestions are appreciated.