For those who’ve read the section above about metal foil stamping, the procedure will probably be easy to image. In the stack of products: your cover on the bottom. Above it the (optional) foil and after that the metallic stamp (die) that has a reversed Variation of your respective variety https://graphicdesignbookcovers.blogspot.com/2024/09/a-book-cover-design-can-make-difference.html