The main materials of paper bags are: White Cardboard, Kraft Paper, black cardboard, copper paper and special paper. 

1, the advantages of white cardboard: solid, durable, good smoothness, printing out the color is rich and full, paper bags often used 210-300 grams of white cardboard, often used more is 230 grams of white cardboard.

 2, the material characteristics of COPPER PLATE PAPER: Whiteness and gloss are very good, printing can make the picture and picture three-dimensional sense, but it is not as solid as white cardboard. Paper bags are usually made of 128-300 grams of copper paper. 3, Kraft paper advantages: there is a high toughness firmness, not easy to tear, kraft paper is generally suitable for printing some monochrome or color is not rich in two-color paper bags.