檢查是否是紙張膨脹引起的，通常是把印版四角的十字記號與印刷品上的十字記號進行比較。然而，實際的方法只是觀察印刷品上的十字標記，檢查顏色之間是否有相對位移。因為無論顏色之間的位移是平動的、傾斜的還是兩者兼而有之，只要位移方向相同、角度相同、間隔相同，就可以斷定紙張沒有被拉伸。對于這種不因紙張的膨脹和收縮而引起的簡單位移，檢查紙張的裁切（尺寸、直角）是否符合要求。沒問題，那可能是印刷機內部的機械問題。需要注意的是，當使用剛度較弱的薄紙時，特別是高速印刷相冊時，上述位移可能是由于套準機構功能不足造成的。
To check whether it is caused by paper expansion, it is usually to compare the cross marks on the four corners of the plate with those on the printed matter. However, the practical method is to observe the cross marks on the printed matter and check whether there is relative displacement between the colors. Because no matter the displacement between colors is translational, oblique or both, as long as the displacement direction is the same, the angle is the same, and the interval is the same, it can be concluded that the paper is not stretched. For this kind of simple displacement not caused by the expansion and contraction of the paper, first check whether the paper cutting (size, right angle) meets the requirements. No problem. It could be a mechanical problem inside the press. It should be noted that when using thin paper with weak rigidity, especially when printing photo albums at high speed, the above displacement may be caused by insufficient function of registration mechanism.
檢查每張紙張的套印誤差是否由紙張拉伸引起。當每一張相冊的印刷性能有明顯差異時，可能是由于套印調整機構或紙張的直角。如果套色一致或相近，原因可能是二種顏色后印刷過程中滾筒和輪齒有問題。檢查出現的顏色。當單色儀的所有顏色都不準，可確定原因是整個印刷過程中剪紙不良或濕度變化大。如果只出現特定顏色，則可以確定原因，因為打印機本身存在問題。但是，如果只是顏色的位移較大，而兩種顏色之后是正常的，那么可能是由于翹曲、含水量低、波浪彎曲等原因造成的，這種問題可以通過吸收顏色印刷后的浸泡水來糾正。查抄在哪一部分與紙張無關的套印不準確，紙張各部分的位移程度是一樣的。但由于紙張的膨脹和收縮造成的套印不準確，位移的程度與距離成正比，即離口或側規越遠，位移越嚴重。
Check whether the overprint error of each paper is caused by paper stretching. When the printing performance of each album is significantly different, it may be due to the overprint adjustment mechanism or the right angle of the paper. If the colors are the same or similar, the reason may be that there are problems with the roller and gear teeth in the printing process after the two colors are printed. Check the color that appears. When all the colors of the monochromator are not accurate, it can be determined that the reason is poor paper cutting or large humidity changes in the whole printing process. If only a specific color appears, you can determine the cause because there is a problem with the printer itself. However, if only the displacement of the color is large, and it is normal after two colors, it may be caused by warpage, low water content, wave bending and other reasons. This problem can be corrected by absorbing the soaking water after color printing. Check in which part of the paper has nothing to do with the overprint is not accurate, the displacement of each part of the paper is the same. However, due to the expansion and contraction of the paper caused by the overprint is not accurate, the degree of displacement is proportional to the distance, that is, the farther away from the mouth or side gauge, the more serious the displacement.
以上介紹了通過觀察套色不準確的樣品來判斷原因的基本方法。我們需要知道齒和側規的位置，印刷順序，以及多色印刷是用單色機還是用多色機單色印刷。掌握連續印刷的幾個樣品也是必要的。
The above introduces the basic method of judging the cause by observing the samples with inaccurate color registration. We need to know the position of the teeth and side gauges, the printing sequence, and whether the multi-color printing is monochrome or multi-color. It is also necessary to master several samples of continuous printing.
