These are amazing, I usually press at 400 however I do these ones at 375 for 50 seconds only , and then place under a flat hard surface until it is cooled or it can bend a bit! ( if it does bend just reheat and flatten) turns out great every time. I never have and issue with the 12" just once I get to the 16" is where they can bend a bit.. this is not a complaint, because they sub beautifully, just how to avoid issues :)