Cardboard has the advantages of long fibers and high rigidity, is easy to process and economical as well. To produce different visual effects, the cardboard surface can be subjected to treatments such as color-printing, polypropylene coating, spot varnishing, hot stamping, embossing, gold/silver foil, laser printing, pearlescent coating, sanding, glitter, etc. Cardboard is commonly used in drug-cosmetic product boxes, structural boxes, cultural creative designs, book covers, tags, perfume boxes, CD slipcases, folders, liquor boxes, etc.; these are products that require the use of stiffer paper.