由于印刷方面的各种因素，彩色印刷原稿的质量存在很多问题，如：偏色、晕虚、颗粒感强、缺少层次等等问题。所以要得到高质量扫描彩印原稿本，所以济南彩色设计印刷技术人员需要根据不同的情况做具体的扫描措施，对原稿进行特定的矫正操作。那么彩色印刷如何处理原稿色偏问题？

Due to various factors in printing, there are many problems in the quality of color printing originals, such as color deviation, halo, strong graininess, lack of layers, and so on. Therefore, in order to obtain high-quality scanned color printing original manuscript, Jinan color design and printing technicians need to take specific scanning measures according to different situations and carry out specific correction operations on the original manuscript. So how to deal with the color deviation of the original in color printing?

在原稿色彩质量的分析中，若原稿的三色密度与反差基本是相同的，说明原稿不偏色，色调基本正常。如果阶调齐全、层次丰富、分布合理，即使总反差略有差别，都可算是正常原稿。其颜色复制可按正常的色误差数据进行校正，侧则放在阶调层次复制方面。

In the analysis of the color quality of the original, if the density and contrast of the three colors of the original are basically the same, it means that the original is not biased and the tone is basically normal. If the scale is complete, the level is rich, and the distribution is reasonable, even if the total contrast is slightly different, it can be regarded as a normal manuscript. The color reproduction can be corrected according to the normal color error data, and the emphasis is on the gradation reproduction.

若原稿的三色密度高低不同，说明偏向某一偏色，但三色密度的反差基本相等，是均衡偏色，多为色灰雾所致。这种偏色稿，一般阶调层次还较好，可以用改变分色图片高、低调三色网点记录设定，并配合中调层次调整，使三色版图片达到全阶调即达到灰平衡再现，来图像偏色。但好是根据三色密度曲线，设计出调整三色灰平衡的层次复制曲线，能使全阶调的色调得到统一纠正。

If the trichromatic density of the original is different, it means that it is biased towards a certain color deviation, but the contrast of the trichromatic density is basically the same, which is caused by balanced color deviation, mostly due to color fog. This kind of color deviation draft has a good level of tonality. You can change the recording settings of high and low tone tri color dots of color separation picture, and coordinate with the adjustment of middle note level to make the tri color plate picture reach full level, that is, achieve gray balance reproduction, to eliminate image color deviation. But the good thing is that according to the tri-color density curve, a hierarchical reproduction curve is designed to adjust the tri-color gray balance, which can make the hue of the full-scale tone be uniformly corrected.

若原稿的高光三色密度基本一致，只有暗调端的三色密度不同，密度反差也不等，在中暗调表现明显偏色。暗调层次略有损失，中高调层次正常。可以改变分色图片暗调三色网点记录设定，或附加某色的全调底色去除（只对混合复色有作用），来三色记录图片在暗调端的偏色。好也由三色密度曲线推导设计出调整灰平衡的三色层次复制曲线，能按准确数据纠正其偏色。

If the highlights of the original are basically the same, only the three color densities at the dark end are different, and the density contrast is also different, and the color deviation is obvious from the middle to the dark. The level of low key is slightly lost, and the level of medium and high key is normal. You can change the setting of the darkened three-color dot recording of the color separation picture, or add the full-tone background color removal of a certain color (only effective for mixed multi-color) to eliminate the color deviation of the three-color recording picture at the darkened end. It is also good to derive and design a three-color hierarchical replication curve to adjust the gray balance from the three-color density curve, which can correct its color deviation according to accurate data.

如果彩印原稿三色密度曲线是交叉的，其图像色调偏向于一种颜色，而暗调端则偏向另一颜色，这是感光片本身三色平衡失调而造成的交叉偏色。其各级阶调层次都不良，在扫描仪或分色机上直接用改变三色层次调整与记录设定来纠正其偏色就不容易，必需依据其三色密度曲线，推导设计出精确的调整灰平衡三色层次复制曲线，指导其三色层次调整与记录设定，方能使其复制效果稍有改善。偏色密度差距在0.2以上者，一般就很难矫正复制。

If the tri-color density curve of the color printing original is crossed, the image hue is biased towards one color, and the dark end is biased towards another color, which is the cross color deviation caused by the imbalance of the tri-color balance of the photographic film itself. It is not easy to correct the color deviation by changing the adjustment and recording settings of the three color levels directly on the scanner or color sorter. It is necessary to derive and design an accurate adjustment gray balance three color level replication curve based on its three color density curve, and guide its three color level adjustment and recording settings, so as to slightly improve its replication effect. It is generally difficult to correct and copy the color deviation density difference above 0.2.

这也就解释了为什么印刷品出现变色的问题。画册、书刊、报纸、年画、广告画等印刷产品，在阳光、灯光的照射下，通过油墨色料选择性的吸收和反射，才能呈现出五彩缤纷、万紫千红的颜色。更多相关内容就来我们网站https://www.sdhzyw.com进行咨询吧！

This also explains the problem of color change in printed matter. Printed products such as picture albums, books and periodicals, newspapers, New Year pictures, and advertising pictures can only show colorful and colorful colors through selective absorption and reflection of ink and color under the irradiation of sunlight and light. Come to our website for more relevant content https://www.sdhzyw.com Consult!