In our lives all kinds of paper and cardboard their original raw materials are derived from the nature of the wood, it is because people are large quantities of deforestation caused by soil erosion, dust storms and other adverse effects. In recent years in order to protect the environment, people also attach importance to the protection of trees, double gray cardboard is a green cardboard. Maybe some people do not understand the double gray cardboard, do not know its contribution to environmental protection. Double gray cardboard is made from a recycled waste paper, which is recycled for waste. However, even if this waste is recycled again, it contributes a great deal of strength to people's life. , Boxes and so on are made of double gray cardboard made.