I slipped two strips of thinfire under the square already on kilnshelf because the square looked too small at the last minute. Mistake!! It left a slight ridge on the shelf side of the 6mm full fused (3mm tekta and 3mm light green transparent) piece, very visible as it is transparent. I thought it might soften when I slumped it but it did not. I would like to refuse it flat to eliminate the slight ridge. What firing schedule (how high a temp and hold) will I need to make the plate slump back flat and have the glass melt enough to eliminate the slight ridge?
10.5 inch square 3mm tekta 3mm light green transparent,
and then slumped
Olympic 18" kiln