Im new to this forum but been printing sublimation for around 5 years. Everything Ive learnt has been trial and error and a little help from where I bought my printer.
I was advised to press at 195C. The mugs goes cold/warm into the press ( which shows a temp of around 200c) , the temp then drops to around 150c and takes about 210 seconds to come back up to 195c. I then leave it at that temp for 30secs, no more or it burns. The magic being 195c for 20 to 30 seconds.
This has worked for me.
Earl