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Color Processing Technology of Gravure Printing Image

Update time : 2020-12-03

Source : Zhejiang Deguang Machinery Co.,Ltd

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Color Processing Technology of Gravure Printing Image
The color processing technology of gravure printing image belongs to the prepress basic knowledge of gravure printing. In the preparatory work of gravure printing, the following four essentials should be mastered when adjusting defects such as insufficient local color saturation.

1. Additive and subtractive colors should not be excessive
① The additive color of the basic color should not be too large, and the gradation in the basic color should be maintained, and the gradation cannot be caused by excessive addition.
②The amount of color correction of the opposite color should not be too large, and the relationship between light and shade, light and shadow in the color should be maintained, and the color can be simplified due to the excessive correction of the opposite color.
color processing technology of gravure printing images
2. Maintain the relationship between color intensity and light intensity
When adjusting a certain color, the color of the bright part should not exceed the color of the middle part, and the color of the middle part should not exceed the color of the dark part. Keep the color and light level of the color. The relationship between light and shade and depth. In some prints, the color of the bright part is adjusted too deep and too heavy, and the color of the dark part is processed too bright and bright, losing the normal relationship of colors, giving people an uncomfortable feeling.

3. Grasp the law of spatial distance change of color
In terms of color, our line of sight is affected by the atmospheric medium of space, and objects at different distances will have different changes in shape and color. The near-large and far-small object is the principle of spatial perspective, and the near object is clear, the distant one is blurred, the color perception is strong near, and the distant one is weak, which is the result of color space perspective. Therefore, when adjusting a certain color, it is necessary to grasp the law of change when the color expresses the space distance, the near is warm, the far is cold; the near is pure, the far is gray; the near is bright, the far is blurred, the near is strong, and the far is The contrast is weak.
color processing technology of gravure printing images
4. Master the law of color change
In the natural scenes taken by color photography, we found that the color of the light-receiving surface of the object is inseparable from the warm and cold changes of the light source color, and the color of the dark side is closely related to the warm and cold changes of the surrounding environment. Therefore, when making color adjustments, it is necessary to grasp the law of color change. At the same time, pay attention to the following two issues.
①There are three parts in the light-receiving surface of the object image: highlight, bright and mid-tone. The hue of the bright surface is mainly the combination of the light source color and the inherent color. The warm and cold tones are transferred from the warm and cold light source colors; the color of the highlight part Generally speaking, it is the hue and color of the light source color; the light received by the adjusted surface in the object image is not direct light, but side light, which is more complicated and rich in hue and color. Its hue is the complementary color of the light source, the inherent color and the ambient color Comprehensive, its color perception is dominated by inherent colors.
②The hue of the dark side of the object image is mainly a mixture of ambient color and inherent hue. The warm and cold tones are transferred from the warm and cold of the ambient color, and the color of the dark part always has a tendency to complement the light source color. Therefore, it is necessary to pay attention to the darkening of the color is never the deepening or darkening of the inherent color. The relationship between cold and warm color changes in photographic pictures can only be achieved with a standardized scanning color separation method that restores the original.

Zhejiang Deguang manufactures various types of gravure printing machines, dry laminating machines, flexo printing machines, bag making machines, glove making machines, etc. We are a professional machinery manufacturer. To learn more about the color processing technology of gravure printing images, please contact us.

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