One of the many steps during the printing of a book is to confirm the printer is using the correct binding material. This is also your last chance to see and approve the hot foil stamping placement, foil color, and stamping job quality before the printer produces hundreds or thousands of finished bindings for the book.
Here is an example from READING STEPHEN KING, which will be published later this year. If you click on the image below and view the high res photo, you can almost see how DEEP the stamping plate is pushing to get this particular hot foil to cover properly:
(PHOTO LOST DURING WEBSITE TRANSFER)