Heard a guy at the Corning Museum talk about annealing thick pieces

Leo Campbell · 2026-03-21T12:00:07.292862+00:00

He said for a 2-inch thick paperweight, you need to soak it at 950 degrees for at least 48 hours, not just overnight. I always just guessed at my soak times based on thickness, but that specific number made me realize I was probably rushing it. How do you all figure out your annealing schedules for really heavy stuff?

wright.cole6mo ago

Man, that's wild. I never even thought about the center of the piece lagging that far behind in temperature. So your kiln says 950, but the core could be way cooler for hours, right?

5

olivere306mo ago

That 48 hour figure is a real eye opener. I used to just double the thickness in hours and call it good, but that's clearly not enough.

2

wesleyjohnson6mo ago

Yeah, I used to just wing it too. That math really puts it in perspective.

1