Cover hot stamping process, first layer cover 350g white card The second layer of cover hot stamping process is also 350 grams of white card Bottom white card 350g 60 sheets of 70 gram white double-sided adhesive paper with color printing on inner pages. 3 layers, 22 sheets per layer of color inner pages Coil material. Colored metal double coil The entire book, including the cover and back cover, consists of 70 sheets