The problem of inaccurate printing color in the ho

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Many printing houses often encounter customers who say that the color is not correct, but the printing houses say that they have done their best. What is the problem? Especially now that computers are developed, designers can make colors in their hands and press two keys to set colors. This kind of work used to be some professional color separation and plate making work, but now it falls to different workers. The question is whether they have enough printing knowledge, what ink system, paper characteristics, dot increase, color separation settings, such as total ink volume, UCR, GCR, UCA, etc, Among them, spot color and four color are more common. All the above problems will have the opportunity to make the color inaccurate. In view of this, I hope to share some experience with you in the following space

classification of printing inks

the inks specified in the desktop design software are divided into two categories, spot color ink and process color ink. First, let's take a brief look at four-color inks. There are three systems of four-color inks currently used in the world, including: Japan standa2, checking whether the computer hardware driver is successfully installed Rd, the American Standard and the European standard

these three ink colors are based on people's different preferences for color in different regions. Asian inks are mainly Japanese, usually bright and exaggerated, while European and American inks advocate nature. Spot color inks have several sets of standards, such as Pantone, DIC and Toyo ink, which are subdivided into general spot color, fluorescent color and metal color. The color designation can be divided into four colors and spot colors. The designer should specify the color of the ink according to the type of ink used in the final printing, otherwise the expected effect may not be achieved

color matching system of four-color and spot color inks

most typesetting and drawing software allow you to use spot color and four-color at the same time in the same manuscript. It also provides an option for you to choose spot color printing or convert spot color to the closest four-color point. Why use both four colors and spot colors on the same print? The most common reason is to include the photos while making the special company colors match accurately, such as those used as the company logo or product packaging

spot color printing can be used when there are only oneortwo colors on the page. In addition, spot color printing is based on different color requirements to prepare spot color inks. The colors contained in some spot color inks are four primary colors that can not be obtained according to statistics, such as silver, gold, fluorescent color and some bright colors. Spot color is usually used in occasions requiring high printing color accuracy, such as company logo, packaging, etc

four primary colors printing is based on a certain proportion of three primary colors: cyan, magenta, yellow plus black ink to produce various colors on paper. The bottles used in the construction of the island are all from the local garbage collection points. When there are more than three colors on the page, it is most reasonable to use four primary colors for printing, which is basically necessary for the reproduction of full-color images

according to different needs, the refitting of the experimental machine starts from the test refitting. Therefore, in most software, there will be different choices of color matching systems. The most common are Pantone, trumatch, focoltone, DIC and Toyo, which are applicable to different countries and regions, and also can be divided into spot color series and four-color series. Therefore, when designing the color matching, please select the color matching system according to the series of ink systems that will be used during printing. And you should buy a color sample of the selected color book as a reference, because the colors you see on the screen may be different

reprinted from: Greater China Printing Art

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