[Abstract] The close relationship between the design of packaging and printing manuscript and the copying technology of packaging and printing is expounded. It is pointed out that only when the two are combined in the design can the packaging and printing products be perfected. Based on this, starting from the characteristics of packaging and printing process technology, the requirements of the design of packaging and printing manuscripts by the embossing and offset printing processes are mainly studied.
Keywords: packaging and printing; manuscript design; embossing; offset printing; combined packaging printing manuscript design and plate printing between the mutual promotion and mutual restraint relationship. The success of a packaging and printing product should be multi-element and all-round. It is a systematic project involving design, plate making, printing, etc. It is subject to certain limitations of plate printing technology. Packaging and printing design cannot design art and plate making. Printing and copying technology splits. For this reason, it is necessary to study the constraints and transform the constraints into positive factors for design and design orientation.
The manuscript is the basis for plate making, the basis for printing, and one of the important conditions for obtaining high-quality packaging and printing products. Only high-quality packaging and printing design manuscripts that meet the requirements of the plate printing process can obtain high-quality packaging and printing products. Because different packaging and printing process technologies have different characteristics and adaptation scopes, the requirements and restrictions on the design of packaging and printing manuscripts are not the same. Therefore, for the packaging and printing design industry in China, due to the late start, and the fact that design and printing are not well combined, proceeding from the characteristics of the packaging and printing process technology, we mainly discuss the requirements for the design of packaging and printing manuscripts for relief printing and offset printing. In order to explain the combination of package printing manuscript design and plate printing.
1 The requirements of letterpress on the design of packaging and printing manuscript The letterpress printing is an ancient printing method (commonly known as lead printing). Its packaging and printing products have sharp outlines, strong brushstrokes, and colorful features, but do not perform well on outlet products. Therefore, the embossing is suitable for the printing of manuscripts of line drawings, and is mainly applied to the packaging printing in which color blocks, lines, and characters are the main components of the decoration.
Line drawing manuscripts refer to manuscripts that do not have changes in light and darkness. They consist of patches, lines, and text. Most of their black and white manuscripts express gray levels in dots or lines. Color blocks in color manuscripts are flat-coated, similar to black-and-white prints or typography. print. This type of packaging and printing design manuscripts should pay attention to the following aspects in the design of the letterpress plate, printing requirements.
a. Draw quality. In order to ensure plate-making quality and reduce revisions, line drawing manuscripts must be drawn in black and white, sharp and crisp, with uniform color blocks; clear lines, no broken pens, adequate thickness, and fine lines cannot be lost after photocopying. Others Lines can't run out of rough edges after zooming in;
b. Color indication. The color draft is the basis for plate separation, and in order to ensure the accuracy of plate making and color separation, the use of color must be accurate when designing the color draft. Designers often fail to accurately express design intent because of the quality of the pigments, or because the brush is not clean, resulting in the monochromatic color of the design being converted into a complex color. At the same time, due to the difference in the hue between the printing ink and the pigment, often The difference between the printed color and the design color resulted in the failure of the entire design. In this regard, in order to facilitate color separation and ensure the accuracy of color separation, it is best not to use coloring of pigments directly as the basis for color separation and platemaking, but to search the relevant printing chromatograms, using letters, Digital or textual descriptions to accurately represent the coloring of the original, or indicate it with a corresponding print ticket. In particular, when the ink is used for overprinting, due to the difference in characteristics of the ink and the paint pigment, the effect of the overlay of the ink cannot be inferred from the effect of the preparation of the paint.
In addition, with the popularization of computers, manual design has gradually been the desktop of computers. Design replaced. For computer desktop design packaging and printing manuscripts, attention should be paid to the difference between computer coloration, print coloration and printing coloration, and the problem of color correction should be solved.
c. Pattern, text design. Embossing is mainly color printing. Due to errors in the printing registration, in order to facilitate color registration, in the design of patterns and letters, excessively small color patches or excessively fine lines should be avoided. In particular, the text should not be too fine or too small. If the text is too small or too small, it will bring difficulties to the plate printing. It is easy to accidentally miss the word. At the same time, multi-color printing of thin lines and small texts should be avoided because according to the relevant national standards, the overprint error of the main parts of fine products is 0.22 mm, while the width of thin lines and strips is less than o.2 mm, if multi-color printing In particular, it is difficult to reach the customer's request due to errors in the gloves and seals, and it is even more difficult to achieve perfect reproduction of manuscripts.
d. color design. In general, the color design of packaging and printing should meet the needs of art design on the one hand, and it must be easy to print on the other hand. The best printing effect should be achieved with as little color as possible. Specifically, the color design of a packaged printing manuscript should be treated differently according to different printing processes. Embossing, screen printing, and flexo printing are generally performed on line drawing manuscripts. Most manuscripts of this type are printed according to the design manuscript color, and are printed by a spot color printing method. In addition to overlapping color blocks, each color is superimposed. A spot color version can only print one color. This requires attention from the aspects of economical plate making, printing cost, and the deployment of hue and the difficulty of overprinting. As a result, the line drawing manuscript is designed with color concise to avoid excessive color registration. In order to prevent overprinting, the screen is issued with "flowers", and the color registration should not exceed 3 times.
To rationally use the principle of three primary color superposition and color, complex color rendering principle, color matching and superimposition, thus reducing the number of overprint, cost savings. At the same time, we should pay attention to the reasonable use of color separation in the color separation design, because the overprinting ink expansion, strong contrasting color at the junction will produce a dark demarcation line and destroy the picture, so a strong contrasting color should not be color separation. In addition, due to the consistency of the ink supply during printing, the graphic differences in ink demand on the same plate cannot be taken into consideration. Therefore, it should avoid the appearance of graphics with a large difference in ink volume, and avoid designing a large area of ​​background color and small text descriptions on the same color plate. Otherwise, the actual printing will be inaccurate, and fine text will also appear dirty. (To be continued)
Keywords: packaging and printing; manuscript design; embossing; offset printing; combined packaging printing manuscript design and plate printing between the mutual promotion and mutual restraint relationship. The success of a packaging and printing product should be multi-element and all-round. It is a systematic project involving design, plate making, printing, etc. It is subject to certain limitations of plate printing technology. Packaging and printing design cannot design art and plate making. Printing and copying technology splits. For this reason, it is necessary to study the constraints and transform the constraints into positive factors for design and design orientation.
The manuscript is the basis for plate making, the basis for printing, and one of the important conditions for obtaining high-quality packaging and printing products. Only high-quality packaging and printing design manuscripts that meet the requirements of the plate printing process can obtain high-quality packaging and printing products. Because different packaging and printing process technologies have different characteristics and adaptation scopes, the requirements and restrictions on the design of packaging and printing manuscripts are not the same. Therefore, for the packaging and printing design industry in China, due to the late start, and the fact that design and printing are not well combined, proceeding from the characteristics of the packaging and printing process technology, we mainly discuss the requirements for the design of packaging and printing manuscripts for relief printing and offset printing. In order to explain the combination of package printing manuscript design and plate printing.
1 The requirements of letterpress on the design of packaging and printing manuscript The letterpress printing is an ancient printing method (commonly known as lead printing). Its packaging and printing products have sharp outlines, strong brushstrokes, and colorful features, but do not perform well on outlet products. Therefore, the embossing is suitable for the printing of manuscripts of line drawings, and is mainly applied to the packaging printing in which color blocks, lines, and characters are the main components of the decoration.
Line drawing manuscripts refer to manuscripts that do not have changes in light and darkness. They consist of patches, lines, and text. Most of their black and white manuscripts express gray levels in dots or lines. Color blocks in color manuscripts are flat-coated, similar to black-and-white prints or typography. print. This type of packaging and printing design manuscripts should pay attention to the following aspects in the design of the letterpress plate, printing requirements.
a. Draw quality. In order to ensure plate-making quality and reduce revisions, line drawing manuscripts must be drawn in black and white, sharp and crisp, with uniform color blocks; clear lines, no broken pens, adequate thickness, and fine lines cannot be lost after photocopying. Others Lines can't run out of rough edges after zooming in;
b. Color indication. The color draft is the basis for plate separation, and in order to ensure the accuracy of plate making and color separation, the use of color must be accurate when designing the color draft. Designers often fail to accurately express design intent because of the quality of the pigments, or because the brush is not clean, resulting in the monochromatic color of the design being converted into a complex color. At the same time, due to the difference in the hue between the printing ink and the pigment, often The difference between the printed color and the design color resulted in the failure of the entire design. In this regard, in order to facilitate color separation and ensure the accuracy of color separation, it is best not to use coloring of pigments directly as the basis for color separation and platemaking, but to search the relevant printing chromatograms, using letters, Digital or textual descriptions to accurately represent the coloring of the original, or indicate it with a corresponding print ticket. In particular, when the ink is used for overprinting, due to the difference in characteristics of the ink and the paint pigment, the effect of the overlay of the ink cannot be inferred from the effect of the preparation of the paint.
In addition, with the popularization of computers, manual design has gradually been the desktop of computers. Design replaced. For computer desktop design packaging and printing manuscripts, attention should be paid to the difference between computer coloration, print coloration and printing coloration, and the problem of color correction should be solved.
c. Pattern, text design. Embossing is mainly color printing. Due to errors in the printing registration, in order to facilitate color registration, in the design of patterns and letters, excessively small color patches or excessively fine lines should be avoided. In particular, the text should not be too fine or too small. If the text is too small or too small, it will bring difficulties to the plate printing. It is easy to accidentally miss the word. At the same time, multi-color printing of thin lines and small texts should be avoided because according to the relevant national standards, the overprint error of the main parts of fine products is 0.22 mm, while the width of thin lines and strips is less than o.2 mm, if multi-color printing In particular, it is difficult to reach the customer's request due to errors in the gloves and seals, and it is even more difficult to achieve perfect reproduction of manuscripts.
d. color design. In general, the color design of packaging and printing should meet the needs of art design on the one hand, and it must be easy to print on the other hand. The best printing effect should be achieved with as little color as possible. Specifically, the color design of a packaged printing manuscript should be treated differently according to different printing processes. Embossing, screen printing, and flexo printing are generally performed on line drawing manuscripts. Most manuscripts of this type are printed according to the design manuscript color, and are printed by a spot color printing method. In addition to overlapping color blocks, each color is superimposed. A spot color version can only print one color. This requires attention from the aspects of economical plate making, printing cost, and the deployment of hue and the difficulty of overprinting. As a result, the line drawing manuscript is designed with color concise to avoid excessive color registration. In order to prevent overprinting, the screen is issued with "flowers", and the color registration should not exceed 3 times.
To rationally use the principle of three primary color superposition and color, complex color rendering principle, color matching and superimposition, thus reducing the number of overprint, cost savings. At the same time, we should pay attention to the reasonable use of color separation in the color separation design, because the overprinting ink expansion, strong contrasting color at the junction will produce a dark demarcation line and destroy the picture, so a strong contrasting color should not be color separation. In addition, due to the consistency of the ink supply during printing, the graphic differences in ink demand on the same plate cannot be taken into consideration. Therefore, it should avoid the appearance of graphics with a large difference in ink volume, and avoid designing a large area of ​​background color and small text descriptions on the same color plate. Otherwise, the actual printing will be inaccurate, and fine text will also appear dirty. (To be continued)
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