Pits and Flip and Fire
Posted: Sun Jul 28, 2013 1:55 pm
My experience is with jewelry. I'm having trouble getting tiny pits in pieces 6" and larger using COE 90. It's been suggested that these are bubbles rising to the surface and bursting. I've been able to repair them with a heavy layer of clear powder but of course I'd like to skip this step. I use a bubble squeeze and go to a top temp of 1465 holding for 10 minutes in my Skutt Firebox. Would going hotter or holding longer eliminate the pits? I've read everything I can find on pits and can't figure it out.
Also, about half the things I have read on flip and fire do NOT mention that one needs to sandblast. The one time I tried it didn't work because the shelf/shelf paper impression was not eliminated in the subsequent firing. Did I do something wrong or is sandblasting always necessary?
Many thanks in advance for your help. I read this board every day and am always learning something new.
Drewcilla
Also, about half the things I have read on flip and fire do NOT mention that one needs to sandblast. The one time I tried it didn't work because the shelf/shelf paper impression was not eliminated in the subsequent firing. Did I do something wrong or is sandblasting always necessary?
Many thanks in advance for your help. I read this board every day and am always learning something new.
Drewcilla