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          印版版心在圖文部分的定位。

          來源:http://www.mosstuckerlaw.com/   發布時間:2021-12-13
          印版版心在承印物上的定位是正確校版的第一步。
          The positioning of the plate center on the substrate is the first step to correct plate calibration.
          所謂版心的定位實際上就是將印版上的圖文準確的在承印物上進行定位,進而滿足套印和印后加工的要求。對于我們比較常見的印刷品而言,就是把我們需要印刷的圖文部分完整的印刷于承印物表面,而且要有滿足成品要求的頁邊距,同時還要滿足某些印后加工的特殊要求。
          The so-called layout center positioning is actually to accurately position the pictures and texts on the printing plate on the substrate, so as to meet the requirements of overprint and post press processing. For our more common printed matter, it is to completely print the graphic parts we need to print on the surface of the substrate, and have a margin to meet the requirements of the finished product, as well as some special requirements for post press processing.
          ·對于不同的印版和承印物,版心的定位要遵循以下的原則:
          ·For different plates and substrates, the positioning of the plate center shall follow the following principles:
          1.為了滿足印刷的后續工作(裁切、裝訂等)能夠準確順利的進行,除非不得以,一般要求要將版心邊框(圖一虛線部分)和承印物的邊緣(圖一粗黑線框)相平行。
          1. In order to ensure that the subsequent work of printing (cutting, binding, etc.) can be carried out accurately and smoothly, unless it is not allowed, it is generally required to parallel the layout center frame (dotted line in figure I) with the edge of the substrate (thick black frame in figure I).
          2.如果當版心小而承印物較大時,要使版心在承印物上上下、左右居中。
          2. If the print center is small and the substrate is large, the print center shall be centered up, down, left and right on the substrate.
          3.當版心較大,而承印物面積顯得緊湊時,至少要保證圖文邊緣的裁切距離(如圖一中的紅色箭頭所指為裁口距離)。
          濟南畫冊印刷
          3. When the layout center is large and the substrate area is compact, at least ensure the cutting distance of the image and text edge (as indicated by the red arrow in Figure 1 is the cutting distance).
          4.對于有角線的印版,一般將四個角線全部印出,并保證叼口大小一致。在不能保證四個角線全部印出時,在不影響叼口圖文清晰的條件下,可適當的減小叼口尺寸,使拖稍的角線全部印出。
          4. For the printing plate with corner lines, generally print all four corner lines and ensure the same size of its mouth. When it is impossible to ensure that all four corner lines are printed, under the condition of not affecting the clarity of the picture and text of the mouthpiece, the size of the mouthpiece can be appropriately reduced to make all the corner lines dragged slightly printed.
          5.根據印件圖文特征和膠印工藝的特點,應盡量使印件的天頭或印張的定位邊留大些,地腳或印張的非定位邊留小些。
          5. According to the graphic characteristics of the printed piece and the characteristics of the offset printing process, the positioning edge of the top of the printed piece or the printing sheet shall be larger and the non positioning edge of the anchor or the printing sheet shall be smaller as far as possible.
          6.在保證版心位置正確的前提下,對于多色印刷品要保證色與色間誤差不超過0.1㎜,正背套印一般不能超過0.5㎜。
          6. On the premise of ensuring the correct position of the layout center, for multi-color printing, the error between colors shall not exceed 0.1mm, and the front and back overprint shall generally not exceed 0.5mm.
          ·在實際的生產操作中我們除了要嚴格依據工單作業,還有以下的考慮:
          ·In the actual production operation, in addition to strictly following the work order, we also have the following considerations:
          1.實際的印刷紙張由于裁切原因,并不能完全保證紙張邊緣完全整齊(即裁切大小是存在偏差的)。因此我們在版位校正的時候,要根據紙張大小的誤差程度,將版心向規矩邊做適當的移動。
          1. Due to cutting, the actual printing paper can not completely ensure that the edges of the paper are completely neat (i.e. there is deviation in the cutting size). Therefore, when correcting the layout, we should move the center of the plate to the regular edge according to the error degree of the paper size.
          2.當印活版心叼口位置有圖文,尤其是“出血”的印活,要盡量將版心向拖稍移動。這樣做有兩點好處,一是能盡量的保證叼口部分圖文能印足;二是能減小叼口處由于掉版嚴重對于圖文部分的損壞。
          2. When there are pictures and texts at the mouth of the printing plate center, especially for "bleeding" printing, try to drag the plate center slightly. This has two advantages. First, it can ensure that the pictures and texts in its mouth can be printed as much as possible; Second, it can reduce the damage to the image and text part due to serious version loss at its mouth.
          3.對于有一些有特殊裝訂要求的產品要認真分析,比如如圖二示,圖示要求經過1、2兩次滾折完成裝訂的最初步驟,這樣就要求我們必須將距離a和距離b在校正印版的時候達到一致,或a略小于b(如果a大于b的話會導致在2次折頁的時候將左側邊緣在B處受折,由此會導致裝訂困難)。
          3. Some products with special binding requirements should be carefully analyzed. For example, as shown in Figure 2, the figure requires that the initial steps of binding should be completed after 1 and 2 roll folding, which requires us to reach the same distance a and distance b when correcting the printing plate, Or a is slightly less than B (if a is greater than B, the left edge will be folded at B when folding twice, which will lead to binding difficulties).
          諸如此類在實際印刷工作中應當注意的問題還有很多,在此不一一列舉。以上我們簡單介紹了在印版校正的時候需要注意的幾點問題,對于版心在承印物上的位置應該心中有數。
          There are many problems that should be paid attention to in the actual printing work, which are not listed here. Above, we briefly introduced several problems that should be paid attention to when correcting the printing plate. We should know the position of the plate center on the substrate.
          關于印版的色與色間、正背間的套印,實際上和印版在承印物上的定位操作手段是一樣的,只需要將各色印版向預定的印版定位位置拉拽(或用其他方式,以下有介紹)就可以了,本文不再多論。
          The overprint between colors and between front and back of the printing plate is actually the same as the positioning operation means of the printing plate on the substrate. It only needs to pull each color printing plate to the predetermined positioning position of the printing plate (or in other ways, as described below). This paper will not discuss it more.
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