对于印刷来说已经较十几年前进步了很多，不光光是海德堡，曼罗兰，设备优良，自动化程度也高，而且都配置了墨色遥控系统，使印刷品的颜色也控制很方便，四色机一般小型印刷企业都会有四到五台这样的印刷机器，但现实中不光光是靠机器自动化来稳住颜色，操作过程也是需要注意几点的。

For printing, it has improved a lot more than ten years ago. Heidelberg and Manroland are not only equipped with excellent equipment and high degree of automation, but also equipped with ink remote control system, which makes the color control of printed matter very convenient. Four color machine generally small printing enterprises have four to five such printing machines, but in reality, it is not only relying on machine automation to stabilize the color The operation process also needs to pay attention to several points.

，印刷品在上机前师傅也要根据打样稿的颜色，稍微的调节各个墨斗的下墨量，配合印刷机器本身墨色遥控系统，这样就可以轻松的完成，不能在印刷的时候不断调整墨量，会导致颜色的上的色差。

First of all, before printing, the master should adjust the ink amount of each ink bucket slightly according to the color of the proofing draft, and cooperate with the ink color remote control system of the printing machine itself, so that it can be easily completed. If the ink amount cannot be adjusted continuously during printing, it will lead to the color difference on the color.

此外，还要针对该印刷品的用纸质量好坏，图文面积大小，先对油墨的黏度，流动性，干燥性等适当调节，来提高其印刷适性，也要确保印刷正常进行，不能因经常停机清洗橡皮布和印版上的纸毛，墨皮而造成墨色深浅不一，如果到中期再加入黏剂，调墨油那么肯定是要有偏差的。

In addition, according to the quality of the paper and the size of the graphic area, the viscosity, fluidity and dryness of the ink should be properly adjusted to improve the printability, and the printing should be carried out normally. The ink color should not be different due to the frequent shutdown of the machine to clean the paper wool and ink on the blanket and plate. If the adhesive and ink mixing oil are added in the medium term, it would be better There must be deviations.

                           

胶印是利用油水相斥的原理进行印刷的，这个水指就是润版液，它的大小直接回影响墨层颜色。水大墨层色谈，水小墨层就会色深，水越大油墨的乳化越是严重。如何的油墨无光泽，色就谈，乳化油墨的印品不仅色差严重，而且还会产生粘脏不干、印迹不牢等等质量问题，所以在印刷操作中必须严格的控制印版版面的润液大小，做好水墨平衡的工作，要求在不上脏的情况下，水越小越好。

Offset printing is the use of the principle of oil-water repellent printing, the water refers to the fountain solution, its size directly affects the ink layer color. Large ink layer color, small ink layer will be dark, the larger the water, the more serious the emulsification of ink. How to make the ink lusterless, color on talk, emulsion ink prints not only serious color difference, but also produce sticky dirty not dry, imprint not firm and other quality problems, so in the printing operation must strictly control the size of the printing plate, do a good job of ink balance, in the case of not dirty, the smaller the water, the better.

墨辊不良，印品能否获得均匀的墨色，胶辊的质量有很重要的作用，一般胶辊有传墨辊，匀墨辊和着墨辊三种，它们对墨色浓淡有很大影响。墨辊的弹性，粘性，圆心度，硬度和表面光洁度如何，很大程度上决定了印刷品的墨色质量，若出现着墨辊的弹性差，粘性不足，辊体偏心，胶体过硬及胶体老化等情况时，印刷过程中就容易造成着墨不均匀或不稳定，所以印刷时要保证胶辊的质量，才能确保每一个印刷周期涂布于印版上的油墨的均匀传递，同时也应该调整好墨辊之间及墨辊和印版之间接触压力，否则也会造成传墨不均匀，也会产生严重的色差。

The quality of COTS plays an important role in the poor quality of inks. Generally, cots have three types: transfer roller, uniform roller and inking roller. They have a great influence on the shade of inks. The elasticity, stickiness, centrality, hardness and surface finish of the ink roller largely determine the ink quality of the printed matter. In case of poor elasticity, insufficient stickiness, eccentric roller body, hard colloid and aging colloid of the ink roller, it is easy to cause uneven or unstable inking in the printing process. Therefore, it is necessary to ensure the quality of the rubber roller in order to ensure the quality of each ink roller In order to ensure the uniform transfer of the ink coated on the printing plate in a printing cycle, the contact pressure between the rollers and between the rollers and the printing plate should also be adjusted, otherwise the uneven ink transfer and serious color difference will also be caused.

生产中通常是油墨粘度来确定多色机的印刷色序，由于在多色印刷中，油墨是以湿压湿的方式叠印，只有获得更好的叠印率，才能印出墨色稳定，相对稳定的印刷品来。

In production, ink viscosity is usually used to determine the printing color sequence of multi-color machine. Because in multi-color printing, ink is overprinted in the way of wet pressing, only to obtain a better overprint rate can stable ink color and relatively stable print be produced.

在印刷上，影响色差的原因很多，控制方法也有很多，这要求我们在印刷的路上一直不停的探索，积累经验，提高自己也能做出更好的成绩来。

In printing, there are many reasons that affect the color difference, and there are many control methods, which requires us to constantly explore, accumulate experience, improve ourselves and make better achievements on the way of printing.