What kind of material is the color box usually made of
"White background whiteboard" has 2 kinds: 1, white copper, 2, single copper. What they have in common is that both sides are white. The difference is "white copper" : a smooth side is not smooth, that is, one side has coated surface, one side has no coated surface. The popular point is that the front can be printed, the reverse can not be printed.
"Single copper" : Both sides have coating surface, both sides can be printed. Gray bottom gray board has this kind of paper, but it is not used on the color box, gray bottom white board, it is the so-called "gray copper paper" that is, the front is white, can be printed, the back is gray, can not be printed. General white card is "white white board" paper, but the general quotation of short, in addition to special white card, such as: platinum card, white silver card.
Powder grey paper, one side is white, one side is grey, the price is lower, double powder paper both sides are white, the price is higher.