Among the four major packaging materials: paper, plastic, metal, and glass, paper packaging materials are the cheapest and can be recycled and reused, which is good for environmental protection and therefore has the fastest development. Common paper products are: food cartons, napkin cartons, cardboard boxes, corrugated boxes, food paper bags, packaging paper barrels, handmade paper art, and various gift packaging paper products and gift boxes.

Offset printing belongs to lithographic printing. Lithographic printing is the most common printing technology in packaging printing. It has outstanding advantages in high-quality and high-efficiency printing, and a wide range of printing materials. Lithography is an indirect printing. The process of restoring graphics to the surface of the printing material is completed by the effect of the printing plate and blanket cylinder.