Plate Flower Cracks in Glass
I'm wondering if anyone knows why plates would get a crack running from the middle of a glued area out to the edge of the bottom plate? In the attached picture I have a strait line crack in the bottom plate running from the bottom of the blue vase straight out to the edge of the clear bottom plate. I've only had this happen about 4 times over the last 3 years but I can't figure out why it happens? I've had it happen on a small ceramic plate flower also.