... on cover --perfect Products and service: We can produce books as hardcover/softcover book printing;children board book,cataloge,magazine book,picture book,brochure book.1)Paper ... paper;corrugated paper,etc. 2)Paper weight: 60gsm, 70gsm, 80gsm, 90gsm, 100gsm, 105gsm, 128gsm, 157gsm, 200gsm,250gsm,300gsm,400gsm. 3)Printing: 4c+4c(full color ...