How to adjust the printing color separation, dots and ink volume according to the characteristics of the planner notebook paper, is the concern of many factory printers, mainly in the following aspects.
Obviously, different quality of paper page planners will produce different dot gain effects. The stronger the absorbency of the weekly paper, the larger the dot spread value, in detail, newsprint is the largest, and coated paper is the smallest. The dot gain composed of page properties generally exhibits an exponential expansion law, and in the process of prepress processing, it is necessary to compensate for the influence of dot gain.
For different sizes of dots, the dot gain value is different. Common high-key and dark-tone dot gain values are small, and mid-tone dot gain values are large. It is best recommended to use the default settings. For example, the default value is about 17% when printing on coated paper, about 22% on offset paper, and about 30% on newsprint.
1. Set the compensation sample for dot increase
When the ink is transferred to the surface of the weekly paper under the action of pressure, due to the absorbency of the page, the ink spreads to the surrounding when it is saturated, resulting in increased dots, making the entire image darker.
Obviously, different quality of paper page planners will produce different dot gain effects. The stronger the absorbency of the weekly paper, the larger the dot spread value, in detail, newsprint is the largest, and coated paper is the smallest. The dot gain composed of page properties generally exhibits an exponential expansion law, and in the process of prepress processing, it is necessary to compensate for the influence of dot gain.
For different sizes of dots, the dot gain value is different. Common high-key and dark-tone dot gain values are small, and mid-tone dot gain values are large. It is best recommended to use the default settings. For example, the default value is about 17% when printing on coated paper, about 22% on offset paper, and about 30% on newsprint.
2. Select the color separation type GCR, UCR
Using GCR is easy to maintain gray balance, reduces the total amount of ink overprinting, makes the ink dry faster, and improves the printing speed. The quality of the black version plays an insignificant role in the entire printing, and for ordinary manuscripts, GCR is recommended. For special originals, such as images with more high- and mid-tone colors and rich dark tones, UCR can also be used. In short, to be sensitive to control. It is the best advice by GuangAo.
3. Total ink setting
The printing characteristics of the weekly paper planners, as well as the high speed of rotary planners printing, determine that the total ink volume cannot be too high.
Foreign data show that the total black volume of newsprint printing is generally controlled at 240% to 260%; the total ink volume of coated page printing is generally controlled at 280% to 320%; the total ink volume of offset paper page printing is generally controlled at 300% to 340%. The setting of this value is determined by each process and completely depends on the dot gain rate during printing.
If the dot expansion is serious, this value needs to be reduced, otherwise, the dark tones will be smeared locally, and the medium and dark tones will be seriously lost; if the dot expansion is basically normal, this value can be appropriately increased to ensure that the dark tones are full of color and full performance. The dark area level is conducive to the reproduction of the entire tone.
In addition, the corresponding ink should be selected according to different planner pages.
Good products come from GuangAo strict requirements for hardcover planner notebook printing. Details determine success or failure. The best quality comes from the effective control of every process detail in planner printing. Learn more about business and personal planner customized.
