Bite is the front end of the print, also known as the mouth, is the position of the printing machine when holding the paper, and we generally print things, see the size of the printing, we will start to make up, and when making up, there is usually a problem of the bite position of the paper. Now, let's take you to understand the bite position of the printing paper.

咬口是指印刷機械在傳送紙張的時候，紙張被印刷機械送紙裝置所夾住的那部份位置，此處是印刷油墨無法著色的部分，在設計版面或拼版時，不能有畫面內容。無論是對開、4開或8開機印刷，在輸送紙時有一邊是咬口。

Bite refers to the position where the paper is clamped by the paper feeding device of the printing machine when the printing machine is conveying the paper. This is the part that cannot be colored by the printing ink, and there can be no picture content when designing the layout or making up. Whether it is split, 4 or 8, there is a bite on one side when conveying paper.

咬口是指在承印過程中被傳送進機器的一邊，也是印版碰不到的部位。一般控制在7毫米15毫米之間，所以計算實際印刷面積時需要扣除咬口部份的非印刷面積。

Bite refers to the side that is first transferred into the machine in the process of printing, which is also the part that the printing plate cannot touch. Generally, it is controlled between 7mm and 15mm, so the non printing area of the undercut should be deducted when calculating the actual printing area.

自翻版，是在一個印張中，一半印正面圖文，另一半印反面圖文，正反面用同樣的印版各印一次，成為兩從印刷品。印刷中，可以節省印工和PS版。按版面排布形式，又分為上下自翻版和左右自翻板。拼版時要注意左右版留一個咬口位，而上下版要留兩個咬口位。

Self copying is a process in which one half of a sheet is printed on the front side and the other half on the back side. The front and back sides are printed on the same plate once each to form two subordinate prints. In printing, you can save printer and PS plate. According to the layout form, it can be divided into up and down self flipping and left and right self flipping. Make up should pay attention to the left and right version to leave a bite, and the upper and lower version to leave two bite.

總而言之，咬口作為印刷機器在傳送紙張時，紙張被印刷機送紙裝置夾住的位置，在印刷機中油墨是印不到的，所以在實際印刷面積中需要扣除咬口部份。

In a word, as the position where the paper is clamped by the paper feeding device of the printing machine when the printing machine is conveying the paper, the ink cannot be printed in the printing machine, so the bite part needs to be deducted from the actual printing area.