Batch annealing schedule - moretti glass beads in an SC2.

[Magpie]

For big lumps of glass this rate is slower because you have to give the glass time for the heat to perculate through. Therefore - some big glass pieces like paperweights or cast pieces need to be annealed for DAYS not hours, like beads.

If you go to the observatory at Herstmonceaux, East (?) Sussex they have on display a lens from a massive telescope, a bit cracked and battered now, but they cooled it over a period of 9 MONTHS!

[Ali Mesley]

Thanks for asking the question as I was totally stumped with my new kiln too.  Had to get a mathematician to help and your advice was just sitting there.  Great!

Ali