What it does:
Heats the kiln as fast as possible to get the glass to fusing temperatures.
The Final Heating and the Process Stage (more later) share a single firing segment. Here is an example of a final heating step for the Final Heating Phase:
Things to consider:
By the time we get to our final heating segment we are well past the point at which we need to worry about thermal shock so there is no need to slow down.
In fact, our glass has now entered the temperature range in which devitrification can occur. We want to get to our top temperature as quickly as possible, do what needs to be done, and then get out of the devitrification-friendly temperatures.