Application of the hottest spot color art in stamp

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The use of spot color art in stamp printing

stamps are small print, but the printing volume is very large. Not only dozens but even hundreds of patterns should be arranged on a fast printing plate, requiring the color of each pattern The level is completely consistent; Moreover, tens of millions of stamps of the same design have to be printed repeatedly, sometimes for several months

for such a long time, printing the same product in large quantities should also meet the high quality requirements of philatelists and consumers. Not only should each overprint in the full page stamp be accurate, but also ensure that the color and level of the front and back printed face patterns are consistent. This requires that its characteristics be taken into account in the process design before printing to ensure better repeatability of printing

therefore, in addition to the conventional yellow, magenta, cyan and black inks, the application of spot color inks is also essential in stamp printing. According to the characteristics of the original, different spot color inks are used for printing, and the stamps printed can achieve impressive artistic effect and high qualification rate. Therefore, spot color is often used in stamp printing. It is mainly used in the following aspects

first, background color

in stamp printing, the background color has two different manifestations. One is the background color that often appears in the stamp picture as the background of the theme pattern, which needs to use a level bar when aligning. Although it is not the theme of the picture, it plays a very important role in setting off the theme in the whole picture and directly affects the artistic effect of the stamp picture

in order to make the background color of the finished stamps after mass printing basically consistent, without obvious color deviation, and to perfectly reproduce the designer's artistic idea, this background background color is generally printed by chromatic printing. When the background color of some originals is relatively dark, the development history of Jinan gold testing machine or the area of stamps is relatively large (such as small sheets), it is also necessary to design two spot colors with similar color images for printing, so that the background color of the printed stamps is consistent with the original, and the ink layer is thick Plain clothes No flowers No white spots It can truly reproduce the artistic effect of the original

there is also a kind of background color in the process design before printing In order to use printing to control the hue and make up for the color difference between printed matter and drawings, the background color artificially added to the stamp pattern is also printed in spot color. This is because some traditional Chinese paintings and gouache paintings are often used in the originals of stamp designs The paintings of oil paintings are beautifully designed, with rich colors and vivid changes in levels. Such paintings are used to copy stamps

if we simply use the superposition of three primary colors and black to reproduce the picture, the pattern color of the stamp picture will be monotonous and thin compared with the original. If we strive to develop this year's new model to a higher end, it will often give people the feeling of lack of color, which is not as rich as the original Thick, the changes between colors are also relatively stiff and uncoordinated, and the picture scenery also appears dull and rough, and the artistic effect of reproduction is not ideal

on the other hand, from the perspective of printing, if the stamp image completely depends on the superposition of three primary colors to produce color changes, it is difficult to make the face color consistent in mass printing

in this case, in order to perfectly reproduce the artistic charm of the original and lose high-quality finished stamps, the process design should set oneortwo spot colors as the background color of the pattern part according to the main color of the original picture, that is, the supplement of colors, such as dark, light gray, dark, light earthy yellow, purple, etc., plus three primary colors

when printing in large quantities, the main tone of the ticket is fixed, so it is easier to make the ink color consistent and ensure the printing quality. At the same time, it also greatly improves the artistic effect of the stamp picture. Make its tone basically consistent with the original. And it also reproduces the rendering effect of the original color better. The color is rich and soft, the color changes naturally and harmoniously, and the whole picture is flat and delicate

second, the skin color of the character

the skin color of the character, especially the skin color of the face, is an important part of the character pattern, and it is also the main rendering part of art design. This is also crucial in the printing of other books and advertisements. It is more prominent in the printing of stamps. Due to the small area of stamps, the area occupied by facial skin color is smaller. If the three primary colors are used for superimposed printing, it will bring certain difficulties to overprint and ink color control

for example, after mass printing, the face and skin color of finished stamps often appear partial color, and some are partial red Some are yellowish, and the overprint is not accurate, and the facial contour will be deformed. In particular, if the face color of the subject character is inconsistent or the outline is unclear, the image of the character will be affected. In 2012, Xinjiang made the following requirements, which will directly affect the artistic effect of the stamp, and of course, greatly affect the quality of the stamp. Therefore, in the process design, according to the skin color and hue of the original, a special color is generally used as the main color of the skin, and then three primary colors are added to set off the layers. In this way, the color of the skin color of the printed stamp changes little, the overprint is also accurate, the face outline is clear, and the layers transition naturally Soft

III. neutral gray

neutral gray is a sign to test the ink color balance of the three primary colors in printing. Therefore, the reproduction of neutral gray in printing has certain technical difficulties, especially the light tone neutral gray, whose color change is more sensitive visually. If the proportion of the three primary colors deviates slightly, the hue will be very different

in the high-speed printing of large quantities of stamps, if the superposition of three primary colors is used to reproduce neutral gray, its technical difficulty and labor intensity will be very high, and the qualification rate of the final product is very low, and the color of neutral gray on the ticket will be biased. If the standard of finished product quality inspection is not properly mastered, it will bring chaos to the philatelic market. In order to avoid the above phenomena, the neutral gray part of the ticket is generally printed in a spot color gray during the process design. In this way, the finished stamps printed in batches before and after will not have any difference in hue, which can greatly improve the qualified rate of finished products, shorten the production cycle and save raw materials

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