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印版在上机前应检查这四个方面
作者:admin 来源:本站 发布时间:2018-9-25 16:10:48 浏览次数:126
印版在上机前的检查内容
Inspection contents of printing plates before boarding
1、色别的检查
1. Color inspection.
在领取印版时,首先要确定印版的色别,通常有两种方法,一是从印刷的网线角度鉴别,制版时各色印版的网线角度分别被做成不同的角度,检查时可以用放大镜对照付印样上的网线角度进行鉴别。二是根据版面的图文特点及色调深浅进行鉴别,不同的画面,图像结构及色调层次不同,检查时选有特征的、色调反差大的部分进行对照鉴别,其他方法还可以根据是否带有文字、线条、色块等画面特征对印版进行鉴别。
There are usually two ways to determine the color of the printed plate when receiving the plate. One is to identify the screen angle of the printed plate from the screen angle. The screen angle of each color plate is made into different angles when making the plate. The screen angle on the printed sample can be identified by magnifying glass when checking. Secondly, according to the layout of the picture and text characteristics and tone depth to identify, different pictures, image structure and tone levels are different, check the selection of features, color contrast large part of the contrast for comparison and identification, other methods can also be based on whether with text, lines, color blocks and other screen features to identify the printed plate.
2、规线、色标的检查
2. Inspection of code and color code.
印版上的规线一般有十字线、角线、中线、刀线和套晒线等,印刷时根据加工的需要有选择地晒制在印版上。十字线是各色套印时的依据,有的印版采用阴阳十字线,有利于套印准确而且更加直观。角线是一般位于四角由两条横线和两条竖线交叉而成的规线,是图文在纸张上定位时的测量依据。中线对无定位孔的印版来说,是晒版和装版的依据,十分必要。刀线是下道工序折页或裁切的依据。套晒线用来检查套晒的印版是否准确。色标是用来鉴别印版油墨颜色与付印样是否一致的实地块,也可以作为漏色颠倒等质量检查的依据。

The regular lines on the plate generally include cross line, angle line, middle line, knife line and overprint line. When printing, they are selectively sunned on the plate according to the needs of processing. Cross line is the basis of all kinds of color overprinting, some plate using Yin and Yang cross line, is conducive to accurate and more intuitive overprinting. Angle line is a regular line which is generally located at four corners and is composed of two horizontal lines and two vertical lines. It is the measuring basis for text positioning on paper. The middle line is the basis for printing and mounting plates without positioning holes, which is very necessary. The cutter line is the basis for folding or cutting the next process. The sun drying line is used to check whether the printing plate is accurate. Color mark is used to identify whether the printing ink color and printing sample is consistent with the field block, can also be used as a basis for quality inspection such as color leakage reversal.

济南彩色设计印刷

3、图文色调层次的检查
3. Check the level of picture and text.
图文检查包括网点质量、文字校对、线条检查、排版次序、贴码标志等,如果发现问题及时修补,无法修补的重新晒版。色调层次的鉴别主要是为了使印刷品的调子和色彩有良好的再现,鉴别的方法有两种,一是用高倍率放大镜观察印版某个部分的网点百分比,在观察付印样同一部位的网点百分百,两者比较判断印版网点的大小情况。二是用测控条或连续投射梯尺来检查印版的深浅。
Graphic and text checking includes dot quality, text proofreading, line checking, typesetting order, labeling marks, etc. If problems are found in time to repair, can not repair the re-printed. The identification of tone level is mainly to make the tone and color of printed matter have a good reproduction. There are two methods of identification. One is to observe the dot percentage of a part of the printing plate with a high-power magnifying glass, and observe the dot percentage of the same part of the printing plate. The two methods compare and judge the size of the printing plate dot. The two is to check the depth of the printing plate with a measuring bar or a continuous projection ladder.
4、印版版面清洁的检查
4. Check the printing plate's cleanliness.
印版在晒制过程中常会由于各种因素影响产生脏点,在装版以前应尽可能地将其除去,否则印版装好以后再在机器上修去脏点,难度会大大增加,而且容易毁坏印版,印版的背面要检查,如有硬物,可用刮刀轻轻刮去。
Printing plate in the process of drying often due to various factors have dirty spots, before the plate should be removed as far as possible, otherwise after the plate is installed and then repaired on the machine dirty spots, the difficulty will greatly increase, and easy to destroy the plate, the back of the plate to be checked, if there is a hard object, you can use a scraper to gently scrape away.
上文内容是由济南彩色设计印刷厂家提供,想要了解更多的内容,可以关注我们的网站:http://www.sdhzyw.com,在网站中有更多的精彩内容,希望能为你提供帮助!
The above content is provided by Jinan color design and printing factory. If you want to know more, you can pay close attention to our website: http://www.sdhzyw.com. There are more wonderful content in the website. Hope to help you!