... Printing service for hardcover, softcover book; children book, catalog, magazine, paper bag, paper box, calendar, folder, envelope, paper card, poster etc. 3 ... Customized require and OEM is welcome. Item: Duplex board book printing Minimum Order Quantity: 500 Piece/Pieces .Package: ... A4, A5, A3, etc.Paper Material: gloss/matte art paper, cardboard, special paper, etc.Paper weight: From 80gsm to 300gsm ...