My friend gave me a bag of empty Bombay Saphire bottles so I decided to test schedules for flattening these bottles and for flattening broken bottles for making into other items.
Before and after pictures below.
The schedule used worked well. This was the ‘wine bottle flatten’ glass campus firing schedule:
rate 200C to 535C hold 20 mins
rate 500C to 815C hold 30 mins
rate AFAP to 535C hold 60 mins
rate 200C to 150C hold 0 mins