... 4. short lead time Board Book Printing: Best baby board books printingPaper material:White cardboard, grey back cardboard, glossy or matte ... paper & 1.5mm, 2mm, 2.5mm, 3mm gray board.For text: 300gsm, 350gsm, 400gsm white or gray back cardboard back up ... , markers, garland paper, watercolors, glues, pen, pencils, and so on.Artwork format:PDF, Adobe Illustrator, Photoshop, Indesign files. At least 300dpi ...