White cardboard is generally divided into: blue and white single-sided copperplate jam, white copperplate jam, gray bottom copperplate jam.
Single or multi-layer bonded paper made entirely of bleached chemical pulp and fully sized, suitable for printing and product packaging, generally at a basis weight of 150 g/m2 or more. This type of paper jam is characterized by high smoothness, good stiffness, a neat appearance and good formation. Can be used for business cards, menus or similar products.
In the past, some people planned to use quantitative basis as the basis: paper, cardboard and cardboard; white cardboard has high requirements on whiteness, whiteness of A is not less than 92%, B is not less than 87%, C is not lower than 82%.
White cardboard is a kind of white cardboard made of thick and solid pure wood pulp. It is calendered or embossed. It is mainly used for printing and printing substrates. It is divided into A, B and C grades. At 210-400g/m2. Mainly used for printing business cards, invitations, certificates, trademarks, packaging and decoration.