What are the criteria for classifying the material of packaging boxes
There are two major categories: face paper and pit paper. Usually the packaging box face paper commonly used are: gray copper, white copper, single copper, gorgeous card, gold card, platinum card, silver card, laser card, etc. "White background white board" refers to: white copper and single copper. The common point of white copper and single copper is that the front and back side are white. The difference is "white copper": one side is smooth and the other...