Plate printing is more common in the market. Printing houses will focus on printing and printing of common printed matter, but less printing is suitable for printing, so as to save printing costs. The problems of different combined printing process need to be paid attention to in printing factory.

合版印刷就是將不同的畫冊相同紙張、相同克重、相同色數、相同印量的印件組合成一個大版，充分利用膠印機有效印刷面積，形成批量和規模印刷的優勢，共同分攤印刷成本，達到節約制版及印刷費用的目的。

Co printing is to combine different albums with the same paper, the same gram weight, the same color number and the same printing quantity into a large plate, make full use of the effective printing area of offset press, form the advantages of batch and scale printing, share the printing cost together, and achieve the purpose of saving plate making and printing costs.

合版印刷相對于專版印刷，合版印刷的優勢使單價比較低，少量可制作，交貨速度快。但鑒于合版印刷采用網絡傳版，集中印刷，分攤費用的方式，也存在缺失，在合版印刷中難免會造成色差的問題。因合版印刷為多個客戶檔案拼版印刷，因此無法考量單一客戶對顏色要求及調正，如拼在重墨區時，顏色即會偏重，一般來說合版印刷會有約略10%的印刷色差，就算是同一印刷檔同一印刷紙質，每批多少也會存在著色差。

Compared with special printing, combined printing has the advantages of low unit price, small amount of production and fast delivery. However, in view of the lack of network transmission, centralized printing and cost sharing, color difference is inevitable in CO printing. Due to the combination printing of multiple customer files, it is impossible to consider the color requirements and adjustment of a single customer. For example, when it is combined in the heavy ink area, the color will be biased. Generally speaking, there will be about 10% printing color difference in combination printing. Even if it is the same printing file and the same printing paper, there will be color difference in each batch.

滿版色塊（大范圍只有單一色塊無論深淺）在印刷時容易造成重影及滾輪痕跡或印墨不均問題，若是對顏色要求的客戶，建議以專版印刷為優。所以在印刷上需要格外注意，統一色彩管理流程，將不同的客戶的畫冊印刷文件整合進行調圖，再進行拼版印刷；相同色調的印刷文件進行排列。

Full color block (large range of only a single color block, regardless of the depth) is easy to cause double image and roller marks or uneven printing ink when printing. For customers who require color, special printing is recommended. Therefore, we need to pay special attention to the printing, unify the color management process, integrate the printing files of different customers' albums, adjust the drawings, and then make up printing; The printed documents of the same tone are arranged.

對于正規合版需要根據印刷的需要以及印刷廠印刷設備的不同，在上機印刷前拼版的時候要按照實際情況進行不同的調整，在對開和全開的印刷機上可以用套曬、拼曬，并通過自翻身或正反印刷。在進行拼版的時候個注意拼接部分需要留出6毫米的出血位，即每個單頁四周需要留出3毫米的出血。

For the normal combination, different adjustments should be made according to the needs of printing and the different printing equipment of the printing plant before printing. In the split and full open printing press, it can be used to cover the sun, spell the sun, and through self turning or positive and negative printing. In the process of making up, we should pay attention to the 6 mm bleeding space in the splicing part, that is, 3 mm bleeding space around each single page.

合版印刷為印刷行業打開了另一個市場，在一定程度上既滿足了不同客戶小印量的印刷產品質量，又滿足客戶有限的經費上的問題。但是它存在的缺陷也是需要企業特別關注的，希望企業能夠根據自己的需求確認印刷方式。

Co printing has opened another market for the printing industry. To a certain extent, it not only meets the printing product quality of different customers with small printing volume, but also meets the problem of customers' limited funds. But its defects also need special attention of enterprises, hoping that enterprises can confirm the printing method according to their own needs.