... 3.Binding:O-rings,iron hoop 4.Printing:black color paper file printing 1). Size: A4, A3, according to customer ... s design 2). Material: All kinds of paper, like art paper, craft paper, creasing paper and other special used paper, cardboard are available. 3). Printing: ... as book printing, children’s book printing;,paper box printing ;Gift box printing;paper bag printing,gift bag printing,shopping bag ...