... monthly/yearly calendar, company/products/advertisement adbrochure,instruction book,catalogue, card, magzine, hardcover book, softcover book, flyer, folder, sleeve, envelope, poster, ... From 250g to 450g, 250g is the normally used for packaging box like the corrugated box and colorful box. ... 60g to 400g. 120g and 157g is normally used for book printing and envelope.cardboard paper:From 250g to 450g, ...