Custom printing children board book 1.700gsm greyboard+sticker 2.Spot-UV+embossing coard book 3.MOQ:5000pcs 4.100% factory Children board book supplier1.700gsm greyboard+sticker2.Spot-UV+embossing coard book3.MOQ:5000pcs4.100% factory Specification:ProductCustom printing children board book MaterialCoated paper, art paper ,grey board, write paper ,cardboard etc. SizeA4,A3,and other size ColorCMYK ...