The relation between layout design and printing of color newspaper

The colorization of paper is the development trend of newspapers. This article only talks about personal views from the layout design of color newspapers and picture separation, for your reference.

The relation between layout design and printing of color newspaper


A color newspaper print quality has a direct relationship with the layout design. If the layout designer understands some basic printing knowledge, the design and consideration of the subsequent process flow will help the cooperation of various technological processes and improve the printing quality of the product. I think that the following points should be noted.

1, small words try to use a single color.

Use words that are less than size 4 in a single color. Due to the fast printing speed of newspapers, the high water resilience of newsprint papers, the subtle errors in imposition, printing, and printing, and the performance problems of printing presses, etc., it may affect overprinting. If more than two colors are used for words under No.4, the overprinting may be inaccurate.

2. The color of text and shading should not exceed 3 colors.

Some fine art editors do not think about the characteristics of printing in color, and do whatever they like. The color or shading color of the word is overlaid with more than 3 colors, which not only wastes ink, but also brings great difficulties for printing. We know that Y+M+C=K. Theoretically, the same proportions of the three primary colors of Y, M, and C are superimposed into different proportions of gray. However, in the printing of newspapers, any gray that is overlaid by Y, M, and C colors Apply the proportion of pure gray instead.

3, use a large area of ​​dark shades.

Shading can play a role in beautifying the layout, but in the layout of newspapers, the characteristics of newspaper printing should be considered. As newsprint is printed on newspapers, newsprint paper has high ink absorption and water absorption. If the shading area is too large and the color is too dark, more than 50%, it will inevitably cause the paper to wrinkle and even cause a paper break. This is a double-sided effect. The performance of the newspaper was particularly evident.

4, 10% of the same hue as a rung.

Newspaper printing is a high-speed printing of newsprint, and the dot enlargement rate is much larger than that of coated paper. Therefore, the color of the same hue is best graded by 10% to be more clearly resolved. In addition, due to dot gains, more than 80% of the same hue will not be much different.

5, multi-colored superposition of the background as much as possible without a small font Yin.

The vignettes on the monochrome shading may be blurred due to printing stencils. The vignettes on multi-color shading are even more unclear due to overprint errors. Smaller strokes such as the Song No.5, and smaller Yinshao No.5, are particularly prone to this problem.

Newsprint color picture color separation

The color separation of newsprint images must meet the printing characteristics of newsprint. To make high quality image separation, the distinction between newsprint and coated paper must be clearly defined.

1, calibration difference

What is calibration? Simply put, it is to determine the black and white field. Black and white fields determine the tone levels of a picture. Coated paper prints have a large range of tones, typically 3% to 97%, whereas newsprint prints typically have 5% to 85%, and the tone range is small. This means that in the separation of newspaper pictures, it is necessary to make a larger compression of the original tone, removing 5% or less of the level, that is, white, more than 85% level and level.

2, different levels of selection of curves

Because the dot-printing rate of newspaper printing reaches 30%-35%, if the level of the picture is not pulled apart, the printed newspaper will be boring and unclear. If you use electricity to separate color, you must design a newspaper image color separation curve that is suitable for different types of originals. Generally, there are three: standard original curves, overexposed original curves, and underexposed original curves. If you use a scanner to scan color separations, such as Lino-Hell's S3400, Doha, etc., the software itself has multiple levels of curves, as long as the corresponding curve scanning is selected for different originals, you will get better results.

3, different emphasis on sharpness

The sharpness emphasizes (sharpness) is not enough, the outline is not clear, the picture is blurred; the sharpness emphasizes too much, the outline of the picture is stiff. The quality of the sharpness control directly affects the separation quality of the picture. For different types of pictures, find the right level of sharpening from practice.

4, the difference between the black version

Compared to coated paper, the black version of newsprint should be heavier, and the “larger black version” is used in the PHOTOSHOP separation settings. Due to the fast printing speed of newspapers, if the black version is small and the corresponding Y, M, and C versions are heavy, it will inevitably cause drying problems and cause dirtiness.

5, the difference in saturation

Due to the low whiteness of newsprint, color separation should be more saturated than that of coated paper. As far as possible, small proportions of opposite colors should be removed. That is, the basic color should be as large as possible, and the opposite color should be as small as possible.
The separation of a picture is good or bad, mainly depends on whether to restore the original, and then make appropriate modifications based on this, to make a more beautiful effect. The so-called restore, including clarity, brightness, contrast, saturation, level and other restore. When scanning color separation, different processing methods should be adopted for the different characteristics of coated paper and newsprint printing, so that the images can be printed on different papers with the most satisfactory color reproduction effect.




Source: PACK.CN