First, preprinting can reduce VOCS emissions more effectively.

VOCS is an organic compound having a boiling point of less than or equal to 250 degrees Celsius at 101325 PA at atmospheric pressure. VOCs are harmful substances that can be quickly absorbed by the lungs, and most Vocs are highly lipophilic and easily present in the central nervous system through the cell membrane, although the Vocs species, inhalation and inhalation time are different, affecting the human body. It is different. However, it generally produces strong inhibition and anesthesia effects on the central nervous system. Vocs is also one of the main causes of haze.

The pre-printing process uses aqueous inks. The biggest advantage of water-based inks is that they do not contain volatile solvents. Their use reduces the Vocs content, reduces the risk of damaging the health of ink manufacturers and print operators, and improves the working environment.

Second, the use of a pre-printing process reduces the amount of paper used in corrugated boxes.

Pre-printing is to pre-complete the roll-to-roll printing of the paper before the corrugated board is formed, and then send the printed roll paper to the corrugator paper-making station, process the corrugated board, and then form the post-process. Carton. Compared with the traditional offset printing process, the pre-printing process has less paper cutting. In the process of creping paper, due to the pressure, the thickness of the cardboard will be reduced by 0.2–0.3mm, and the finished carton will have a loss of the edge pressure strength. Generally speaking, the edge pressure loss caused by the crepe paper process is about 10%. –Between 30%. Therefore, after the pre-printing process, lighter paper can be used without changing the edge pressure. It has been estimated that using the pre-printing process can reduce paper use by 16% compared to the offset process.

According to market demand, DH has launched a number of pre-printed flexographic machine. The Jiaolong series is a high-end flexographic machine launched by DH for the pre-printed market. All printing station of this model are driven by independent servo drives, and the printing pressure is also controlled by servo motors. The maximum repeating length is 1900mm, and the maximum printing speed is 260m/min. It can meet the preprinting work of different application such as beer box and fruit box.