Packaging printing, as a common packaging product in people's daily life, has different materials and printing types. Each printing material and type has its own characteristics. So what types are there? Changsha Packaging and Printing Factory takes paper products as an example to answer the types of paper packaging and printing.

　　常見的一種劃分方式，根據印版將印刷方法劃分為凸版印刷，凹版印刷，平版印刷以及孔版印刷。凹版印刷印版上的圖文部分凸起，印刷原理類似于印章，木板印刷，凹版印刷與凸版印刷相反，印版圖文部分低于空白部分。平版印刷，印版的圖文部分和空白部分幾乎處于同一平面，利用油水不相溶的原理進行印刷的方式，孔板印刷則是印版的圖文部分洞孔，油墨通過洞孔轉移到承印物表面，常見的孔版印刷有鏤空版和絲網版等。

　　The most common way to divide printing methods into relief printing, gravure printing, lithographic printing and orifice printing. Gravure printing plate part of the text raised, printing principle is similar to seal, board printing, gravure printing and relief printing on the contrary, the print part is lower than the blank part. In lithographic printing, the graphic part and blank part of the plate are almost on the same plane, using the principle of oil-water incompatibility to print. Orifice plate printing is the hole of the graphic part of the plate. Ink is transferred to the surface of the substrate through the hole. The common orifice plate printing is hollow plate and screen plate.

　　凸版印刷、凹版印刷、絲網印刷主要是直接印刷，包裝印刷廠大多是直接印刷，直接印刷與間接印刷以印版是否與承印物接觸來區分，大量的包裝盒印刷，畫冊印刷等多為直接印刷，間接印刷是印版的油墨經過橡皮布轉印在承印物上的印刷方法。直接印刷還需要采用預先制好的印版在承印物上印刷的方式，少量包裝印刷，畫冊定制等則可以采用直接通過計算機驅動的打印頭（或印刷頭）直接在承印物上印刷的方法，如數碼打印。

　　Gravure printing, relief printing and screen printing are mainly direct printing. Most of Changsha Packaging Printing Factory are direct printing. Direct printing and indirect printing are distinguished by whether the printing plate contacts with the printer or not. A large number of package box printing and picture album printing are direct printing. Indirect printing is the printing method of transferring ink from the printer to the printer through rubber cloth. Direct printing also needs to use pre-printed plate to print on the substrate, a small amount of packaging printing, album customization, etc. can be directly printed on the substrate through a computer-driven print head (or print head), such as digital printing.

　　印刷也可根據色數分為單色印刷和彩色印刷，單色印刷多用于筆記本印刷，書籍印刷上，彩色印刷即多色印刷，在原色分色版的基礎上利用顏料減色混合，使原色版重印于同一被印物質上，包裝印刷廠常說的CMYK四色印刷主要采用這種印刷方式。有的包裝產品包裝廠家會采用四色加一個或多個專色的方法，以保證用戶對色彩的得到滿足。

　　Printing can also be divided into monochrome printing and colour printing according to the number of colours. Monochrome printing is mostly used in notebook printing and Book printing. Colour printing is multi-colour printing. On the basis of the original colour separation plate, the original colour plate is reprinted on the same printed material by using the mixture of pigments and subtraction. The CMYK four-colour printing commonly referred to by Changsha Packaging Printing Factory mainly adopts this printing method. Some packaging manufacturers will adopt four colors plus one or more spot colors to ensure that users can meet the requirements of color.