Printed matter is a variety of products printed, and is a general term for various finished products produced using printing technology. In daily life, newspapers, books, magazines, maps, posters, advertisements, envelopes, letterheads, portfolios, trademarks, labels, business cards, invitations, banknotes, greeting cards, desk calendars, calendars, catalogues, and various cards that people are exposed to. , packaging boxes, gift boxes, circuit boards, etc., are all in the category of printed matter. Printed matter is almost filled in the fields of people's clothing, food, housing, and travel. It is very close to people's lives.