An exquisite product packaging, it can arouse people's desire to buy, but also invisibly added value-added products. In today's packaging and printing field, the application of new materials and new technologies is changing day by day. People strive to combine different processes of printing to make packaging prints have a stronger visual impact. Therefore, as the mainstream printing offset printing, combined with the network Plate printing, especially the combination of UV screen printing special ink printing, makes the printing effect of packaging and decoration products even more powerful, more beautiful visual effects.
Our company began to use offset printing combined with screen printing for cigarette pack printing in 2000. In the next few years, wine boxes, tea boxes, food health boxes, mid-autumn moon cake boxes, cosmetic boxes and other paper and plastic packaging are widely used.
Introduction of several common UV screen printing special effects and offset printing combined printing 1. Application of screen printing UV local highlight
This is the most widely used screen printing, offset printing combined printing effect, commonly used in book covers or back covers, album covers, product catalogs and introductions, product brochure covers, product advertising brochures, posters, packaging hard and soft boxes or craft boxes, etc. . UV partial high gloss oil is a kind of high gloss UV transparent oil. On the matte offset printing parts, use a screen to print the UV varnish on some texts and patterns that need to be emphasized to make it produce a partial light on the surface of the drawing. Contrast with dumb, so that the printed products achieve a richer and more beautiful effect. In many cases, the matte film is coated on the printed product, and then the UV partial highlight is printed on the screen, the matte contrast effect is more obvious.
2. Application of screen printing UV convex oil
As the name implies, UV embossing oil is a kind of UV varnish with very high solid content. It is printed on the offset printing parts by thick film screen, its effect is not only the brightness of UV varnish, but also its unique convexity. Sense, in the performance of some physical photos, such as the proper application of processing changes, can play a very good visual effect, and can enhance the three-dimensional and layered sense of physical patterns.
3. Application of screen printing UV ice flower (ie wrinkle)
Screen printing UV ice flower, also known as wrinkle ink, is a specially formulated UV varnish. It is printed on the offset printing piece with a screen. After UV flowering and UV curing secondary UV irradiation, the surface of the UV varnish is visually like ice flower. The texture is wrinkled, and the original UV large crack effect is also evolved from this effect, and the crack is larger and more mad. The application of UV ice flower is also very wide. Generally, the texture of the large-area color block is more effective. Of course, on a layout, the large-area color block and the small-area pattern can be designed to be mixed, which can reflect the dynamics of birth. The effect, if applied on gold and silver cardboard, the effect is more prominent.
4. Application of screen printing UV matte
Screen printing UV matte is also a widely used effect, and the effect of net printing matte on gold and silver cardboard with good offset printing is more prominent. Visually, it is a semi-matte sand-like effect, which is divided into three kinds of fine sand, medium sand and coarse sand. If used well, the effect is very good.
5. Application of screen printing UV snowflake
Screen printed UV snowflakes have been widely used in the past two or three years, especially for the printing on the color printing surface of high-end cigarette packs. Its surface is a completely dumb and delicate texture, and the screen printing UV snowflake is used on the bright offset printing parts, and its effect is also very prominent. Sometimes the screen printing UV snowflake process is used on the offset printing parts of plain laser jam or light beam laser jam to make the picture more vivid.
There are also many special effects of screen printing UV, such as UV small foam, large foam, crystal diamond, magic convex oil, colorful convex oil, water mist, refraction, gold sand, crystal cracks, etc., as long as the design is in place, it will not only improve In addition to the grade of the printed product, you will also get unexpected visual effects. Moreover, sometimes on the surface of the same offset printing, multiple screen printing processes are designed and used at the same time, and the cross-application of lamination (bright film or dumb film) bronzing, embossing and other processes can make a packaging and decoration printed product achieve beautiful beauty Huan effect.
Analysis of Design and Printing Examples of "Qianlong Royal Wine" Wine Box
The decoration design we understand is that the designer expresses the pattern, color, contrast of light and dark on the packaging and decoration products, which can accurately and vividly express the theme, such as elegant, stable, lively, dynamic, simple and so on. As long as the designer can exert his creativity and inspiration to achieve the purpose of the manufacturer. But what we need to do now is the packaging and decoration of offset printing combined with screen printing. In addition to the design requirements mentioned above, it also includes the design and application skills of the screen printing process. Designers must first understand the characteristics of various screen printing inks, especially various UV special screen printing inks, such as UV local varnish, ice flowers, wrinkles, large cracks, crystal diamonds, snowflakes, water mist , Foaming, embossing oil, magic color, colorful, etc. The visual effects, including the state of texture expression, are all well-known, so that the design can be more vivid and vivid on the theme of expressing the packaging, the color is more perfect and more shocking Force and visual impact. At the same time, it is best for designers to have more comprehensive printing knowledge, including offset printing and the above-mentioned screen printing and other comprehensive knowledge, so that the works designed can better represent the characteristics of the product.
The "Qianlong Royal Wine" box printed by our company has won the Gold Award of the 12th Golden Net Award in the 2005 Henghui Cup. Now we will analyze the design of this wine box as an example. The brand of the wine is "Qianlong Royal Wine", and the description also states "Qianlong Royal Wine-China's Royal Health Wine, Qianlong Royal Wine is the best of Qing Palace wine ...". Therefore, this wine box is based on the theme of embodying wine treasures used by the royal family, and uses yellow as the main color (the ancient Chinese emperors' dresses are all reflected in yellow dragon robes), and the main body is also reflected in the shape and color of the plaque of the Palace Museum. The dark gold frame, Beijing cloisonne blue ground, the four-character "Qianlong Royal Wine" glittering on the front, and the "very good, longevity" emperor Qianlong emperor approved on the back. The yellow tone of the box surface is accompanied by a subtle visible Shadow of "Dragon" pattern. The dark golden dragon on the base is staggered in color, but it cannot be separated from the overall yellow theme, and the feeling of the entire classical palace comes out.
The comprehensive application skills of offset printing, screen printing and embossing are the key to expressing the creativity and characteristics of packaging and decoration prints. How do we use offset printing, screen printing, embossing, etc. for the printing process of the “Qianlong Royal Wine†box, staggered overprinting, and well expressed the originality and characteristics of the wine theme?
The first thing to consider is that the main color, yellow, must be expressed distinctively, especially the feeling of the ancient emperor's yellow dragon robe that shows a satin sense. Therefore, we chose 250 g silver cardboard as the base material. The first process is to mix 70% yellow with screen printing and 30% white with screen printing. The second process is to mix with Pan-Pearl Pearl Powder 70% and West German Flash Gold 30% and mix it with varnish. It is still printed in the same yellow screen as the same version. After the medium yellow is dry, it is printed at the same position to make the main body Yellow produces a satin feel and sparkling effect. The third line is the white screen printing, that is, the white background of the samurai trademark and the white background of the barcode. The fourth line is the four-color offset printing, that is, the samurai trademark, plaque frame and black text on the four walls. The fifth line is the screen printing special red, which means that the bold text includes the "Emperor's Treasure" seal on the top of the box. The sixth is the blue screen printing, which is the blue background imitating the plaque of the Forbidden City. The seventh way is to cover the whole box surface with polyester bright film. The eighth line is a plaque blue background printed with UV refraction patterns, including the border "dragon" pattern. The "dragon" pattern on the yellow background in the flash. The ninth track is the theme word, trademark (Samurai), including the embossing of the "Emperor's Treasure" on the top of the box. The tenth pass is die-cutting, so that all processes of the whole box are completed. In summary, the processing color sequence is: screen printing yellow- → screen printing flash- → screen printing white- → offset printing four colors- → screen printing scarlet- → screen printing special blue- → polyester film- → screen printing UV Refractive- → embossing- → die-cutting a total of 10 processes. The base of the box is processed separately, and the four-color offset printing and die-cutting are completed. Finally, the entire wine box is completed by manual process. The production process of the entire wine box above has an overall careful planning and creative considerations from design, substrate selection to printing (including offset printing, screen printing), so if the designer I talked about at the first point does not have If you have a thorough understanding of offset printing, screen printing, including laminating, embossing and other processes, it is impossible to design and produce a packaging and decoration printed matter that has creativity and visual impact in color and process.
Application of pre-press application skills
As we all know, before printing each printed matter, the designed body should be processed into a negative film by computer color separation and color separation, and then made into a plate for printing, especially the processing of offset printing and screen printing is different. The offset printing film is a positive picture. Inverse characters, in many cases, for better visual effects, may not only be four-tone tone, some also need to use spot colors, and more screen printing is to use spot colors. Of course, sometimes in order to meet the needs of design, screen printing on some specific patterns also uses the combination of dot tone and solid color, and screen printing refraction, which must be made with special documents. In the combination of offset printing and screen printing, there are many crafting techniques. For example, when the two are combined, the diameter of the "ten" code alignment line of offset printing is generally 5μm, while the "ten" code alignment of screen printing If the line is 5μm in diameter, it will not be published, so it must be changed to (15 ~ 20) μm, and the bite edge and the drawing edge must be consistent with the offset printing, otherwise the positioning cannot be accurate. A lot of packaging and decoration printed products must be covered with a dumb film or a smooth film after offset printing (the dumb or glossy surface is subject to the design needs), and the tension of the corona layer on the surface of the dumb film or the smooth film must be UV screen printing can be performed on the film surface to achieve the best adhesion when it reaches 42 dynes or more.
The printing paper after offset printing and lamination, especially the thin paper within (80 ~ 127) g, after the lamination, the width of the folio is generally shortened by (1 to 3) mm, and the longitudinal direction is shortened by (0.5 to 2) mm . In the wet rainy season, the paper after stretching may still stretch. Therefore, according to the weather, use the produced negatives to proofread and press the "ten" code horizontal and vertical errors to readjust the horizontal and vertical lengths of the negatives. At present, there are also many UV offset printing parts that are printed with UV light on the surface instead of using a light-coated film. Combined with screen printing after glazing, the effect is better.
Another case is the technique of screen printing combined with offset printing on transparent sheets (PVC, PET) or matte sheets (PE). PVC and PET sheets with static electricity are seriously unable to perform high-speed printing, and need to be removed through static electricity, such as screen printing semi-automatic flat sheet machine is better. PP scrubs have very little static electricity and are suitable for high-speed printing. But the thickness of the sheet should be within 60μm. Generally, the transparent film or frosted film (translucent) are printed on the inside, so the color sequence should be opposite to the surface printing. If the design combines certain special effects with screen printing on the surface of the sheet, that is, the combination of printing and printing, it can more vividly express the theme of the printed matter. However, you must pay attention to the printing. If the inner printing pattern is a positive pull gauge, the direction of the bite will not change when printing, but the pull gauge must use the reverse pull gauge to accurately align. The printing of plastic sheets generally does not have deformation or expansion and contraction of the sheet, and it is not necessary to consider the transparency of the "ten" code of the sheet itself. The illustration of the "Fenghuaxueyue" cake box on the right uses double-sided screen printing of 25μm thick transparent PET sheet. It has won the Gold Award of the 11th Henghui Cup Golden Screen Award in 2003 and the Silver Award of the 2003 Asia Pacific Screen Printing Exhibition.
For packaging and decoration prints combined with offset printing and screen printing, especially in hardcover books and periodicals, the most used is the printed product after offset printing is covered with a matte film, and then the UV screen printing on the matte film is partially bright, and the motif is dull through the local theme. Contrast to increase its visual effect. Of course, there is also a matte oil printed on the bright film, which can also achieve the visual effect of matte contrast. The skills of process application should be continuously explored and improved in practice. In actual operation, due to the slow screen printing speed and high ink cost, every designer and screen printing technologist should try to express the best visual effect with the least screen printing color. For some high added value, and there must be a variety of special effects mixed to be vividly printed, it is another matter.
Prints with more complex colors in combination with offset printing must have a procedure to solidify the sample. Through proofing, defects can be better discovered, deviations, color sequences and effects can be adjusted, errors and omissions can be corrected, so as to make the print more perfect.
The improvement of technology and craftsmanship is endless. Only by constantly improving and perfecting one's own level through tireless exploration and research, can one produce a more contemporary and creative work. The above are some of my experiences in the past ten years of offset printing combined with screen printing, I hope to play a role in attracting bricks and jade, and discuss with you.
Sichuan Soper Science & Technilogy Co., Ltd , https://www.Soper.com.cn