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What it does:
Cools your glass to just above the point at which stress can be created.
Things to consider:
As with Final Cooling, this is simply a transition phase – a step to get us from one temperature (process) to another (annealing). Other than cooling, there is nothing to accomplish and there is little that can go wrong. For almost any firing schedule, the segment for this phase is the same: full speed down to our Annealing phase.