Customized printing paper packaging boxes or paper bags have important management and standardization in terms of color. Every high-end customized gift box has high printing requirements, and the accuracy of color for each order must be above 99%. Below we will introduce various color situations in printing. So that our customized printed paper gift boxes or paper bags have standardized color management from the beginning of design. This greatly reduces the waste of time and cost for our customers in the design process.
The main reason for the application of monochrome black in printing is its better stability and effect. Monochrome black refers to the color setting in CMYK color mode where the values of cyan (C), magenta (M), and yellow () are 0, and the value of black (K) is 100. This setting is more commonly used in printing than four-color black because four-color black printing is more difficult and prone to color cast problems
1. Monochrome black: Monochrome black refers to yellow 0, red 0, blue 0, black 100, and the printed color is pure black;
2. Four color black: It is a type of black color printed by combining four colors: yellow 100, red 100, blue 100, and black 100.
1. Monochrome black: When designing smaller text, monochrome black is used to make it appear clearer;
2. Four color black: When designing images composed of large areas of black, in order to make them appear more vivid
Using four-color black.
There are significant differences in visual effects and practical applications between monochrome and four-color black. Monochrome black cannot achieve the expected black effect due to the thin ink base layer, and the underlying color seeps out. On the other hand, four-color black is synthesized into black through the three primary colors of CMY, which appears darker and heavier visually. However, four-color black may cause color deviation during the printing process due to the opacity of the oil label, especially in thin ink layer printing processes such as offset printing!
The use of monochrome black can avoid the color cast problem that may occur with four-color black, ensuring a more stable and consistent color scheme for printed products. In addition, monochrome black has a purer visual effect and can better meet the strict demand for black in printing dramas. Although four-color black can express some special needs in certain situations, such as cool or warm tones, in most cases monochrome black is the more ideal choice!
Screen printing can only print one color at a time, which is a technical challenge for patterns that require multiple colors, such as four, five, or those with gradient effects. The process of color matching is complex and requires high technical skills from technicians. It is easy to encounter problems of color matching being cold and accurate, resulting in an increase in product scrap rate and cost.
For patterns that require gradients or multiple colors, screen printing seems inadequate.
Screen printing is suitable for printing large quantities of simple colored patterns, as the printed area has a soft touch and the printed patterns are resistant to washing and will not peel off for a long time. However, silk screen printing faces difficulties in processing patterns with complex colors or gradient colors, as the ink in silk screen printing is transferred to the substrate through the holes in the screen, and the size and shape of the holes limit the distribution of ink, resulting in inaccurate reproduction of complex colors!
Ink flowability: Screen printing ink has poor flowability and is difficult to evenly distribute complex colors through the screen. The viscosity and vividness of ink directly affect the printing effect, and high viscosity can cause uneven distribution of ink, resulting in uneven color!
Screen hole design: In the design and production process of screen printing, the size and arrangement of holes limit the distribution of ink, and complex colors require more precise control, which is beyond the capabilities of screen printing technology!
Screen printing is a printing process that uses a screen as a plate base to produce a screen plate with graphics and text through photosensitive plate making method. Then, the basic principle of printing is that the mesh holes of the medical text part of the screen plate can pass through ink, while the mesh holes of the non graphic part cannot pass through ink.
There are mainly two aspects. On the one hand, there are too many colors, which increases the printing cost a lot. Bags are calculated based on one color, and the plate making fee for one color is only 400-800 yuan. If there are five or six colors, the plate making fee alone will be 2000-3000 yuan. On the other hand, bags with fewer colors are usually safer and use fewer additives and dyes, reducing the risk of harmful substances.
Color control is very important in the printing process of food packaging bags. There are three commonly used color control methods: full page printing, positioning printing, and color separation printing.
Full page printing is the process of printing all colors of ink together. This method can print fuller colors, but the accuracy is not as good as the other two methods.
Positioning printing is printed according to the characteristics of each printing color. This method can make the printed colors more vivid, but it requires more plate material consumption.
Color separation printing is based on monochrome ink, gradually overlaying and printing different colors. This printing method has the advantages of good printing effect and clear color hierarchy.
Second printing letterpress printing is the process of printing text and images on a raised surface of a printing plate. Its advantage is that it can print exquisite patterns and text, with bright and full colors. However, the production of theatrical versions is difficult and requires high standards for printing materials.
Flexographic printing is the use of flexographic printing. This printing method can print patterns with richer color levels and relatively lower requirements for the plate material, but it is not as clear as letterpress printing.
The influence of different materials on printing color is significant. The material properties of paper, such as smoothness, whiteness, glossiness, and absorbency, directly affect the reproducibility and visual effects of printed colors!
The smoothness and whiteness of paper can affect the coverage and color brightness of ink. Paper with high smoothness, such as copperplate paper, can better reflect light and make colors more vivid, while adhesive paper has poor color reproducibility due to its rough surface and more ink penetration!
The absorbency of paper is also an important factor. Paper with high absorbency will absorb more ink, resulting in color distortion, while paper with low absorbency can better maintain the color and brightness of the ink!
The thickness and viscosity of the printing ink layer can also affect the color effect. Excessive ink layer thickness can lead to uneven color, while appropriate ink layer thickness and viscosity can ensure the color quality of printed materials!
The printing pressure and the quality of the glue roller can also affect the reproduction of colors. Balanced printing pressure and high-quality rubber rollers can ensure even distribution of ink. So as to achieve better printing effects!
