In the studio album market , the main raw material are the white cardboard and black paper board ,compare with white cardboard , to use black cardboard as the raw material is more high-end. So ,even the price for the black board is higher than the white cardboard ,but some manufacturers was likely to use black paper to product album.
All grey board and double grey board are called grey board for short,The difference is as follows:
1. The color of the paper core is different, the color of all grey cardboard paper surface and paper core is the same, the color of double grey cardboard paper surface and paper core is
Taking Guangdong as an example, we have enumerated the following rules between the price of grey board and the prices of raw materials in different grades of paper mills.