... C4,C5,C6,ZL,DL,B6 2.Material:white or kraft paper,70~120gsm 3.0~4C LOGO printed paper envelop ... the common 4 color(CMYK)process 3) Materials: offset paper,Kraft paper, cardboard, special paper, art paper, close-line paper, ... business envelope, gift envelope, CD packing envelope, white standard envelope, kraft envelope, color envelope, pearlescent envelope, metallic envelope, printing envelope, wallet ...