A guy at the Tacoma studio told me he never anneals his small pendants
I was at the Tacoma Glassblowing Studio last week, you know, just working on some small stuff. This guy next to me, he was making these little pendant drops. I saw him finish one, put it right on the steel table to cool. I asked him about it, and he said, 'Oh, for pieces this small, the annealing oven is a waste of time and propane.' He just lets them sit out. I tried to be nice, but I told him that's a huge risk for thermal shock, even on tiny things. He shrugged it off. Sure enough, about twenty minutes later, we heard a sharp *ping* from his table. One of his pendants just cracked right in half. It was a clean break from the stress. He lost a whole morning's work. Has anyone else run into people skipping the anneal on 'small' items? How do you explain it without sounding like you're lecturing?
Ever see someone try to skip the kiln on a paperweight because it's 'thick'? Same bad logic, the core cools way slower than the outside. That internal stress has to go somewhere, and it's usually straight through the glass.