I heat the press up to 175 degrees and put the comic sandwich in for 15 minutes. Then I shut it off and let the comic and press cool down for 2 hours. This process ensures that the comic doesn’t revert to it’s previous shape and prevents curling.
Pressing can only raise a comic in the same range (e.g., 9.0 to 9.6), but it can significantly improve a low grade book.
Below is my press of Adam: Legend of the Blue Marvel #1