paper envelope,printed envelope 1.Size:C4,C5,C6,ZL,DL,B6 2.Material:white or kraft paper,70~120gsm 3.0~4C ... LOGO printed paper envelop: 1) Size: According to clients' ... color(CMYK)process 3) Materials: offset paper,Kraft paper, cardboard, special paper, art paper, close-line paper, chipboard, white paper 4) Surface disposal: Glossy/matt ...