Compound bag printing is attributed to gravure printing, gravure printing is the skill of engraving gravure from the surface of the picture. Generally speaking, copper or zinc sheet is chosen as the carving appearance. Some of the concave parts can be made by etching, carving, copperplate or mezzotint metal plate method. Collographs may print according to gravure plate.

Gravure drum in the process of rotation will ink bucket to the plate, in the effect of the scraper, scrape some of the blank page of the ink. Plastic film passes between gravure drum and embossing drum. By using the pressure between measuring drum, some ink on gravure drum is transferred to the accepting primer. When the ink passes through the drying box, the solvent in the ink evaporates under the thermal effect, and multi-color printing is finished in the next set. Because the depth of indentation is different on the plate, the depth of the ink layer that can be contained is also different. Transferring to the appearance of the printed matter, solid and gorgeous printing pictures and texts can be obtained through ink superposition.

Understanding gravure printing, so we must understand that before printing in composite bags, we need to make copperplate. Copper plate's perimeter and length are determined according to the detailed size of your food bag. Copper plate is made for the plate making company (so why do you need to pay the plate fee before making the goods). If you already have the plate, you can send it directly.

Here's to explain why some customers say the printing fee is so high. Because the composite bag is gravure printing, it's totally different from the printing of cartons and non-woven bags. This one is engraved on the iron plate and printed on the machine. The edition fee is paid for the first time. If there is no change in the future, the reproduction will not need the edition fee.