Color and characteristics: the color ink refers to a kind of mixed in advance to a specific color ink, such as fluorescent yellow, blue pearl, metallic silver ink, etc., it is not by CMYK four-color mixed, tinted means that accurate color. It has the following four characteristics:

1. The accuracy of each type has its own fixed hue, so it can guarantee the accuracy of color in printing, thus solving the problem of color transmission accuracy to a large extent.

2. Field color is usually defined in a field color, regardless of how shallow it is. Of course, also can give spot color to add net, in order to present spot color arbitrary dark and light tone;

3. Non-transparent spot ink is a kind of covered ink, which is opaque and can be covered in the field;

4. Performance KuanTao color gamut in the library every color gamut is very wide, more than the performance of the RGB color gamut, not to mention the CMYK color space, so they are a big part of the color is CMYK four-color printing ink can't render.

In color dot printing, the reason for choosing the spot color is to choose and use the special color ink. Generally speaking, in two situations:

1. For on print to print out some CMYK four-color printing ink outside of the visible light color CMYK four-color printing ink color gamut than visible light color gamut has obvious shortage, while the color of the ink color gamut than CMYK four-color printing ink wide color gamut, reason can be many color CMYK four-color printing ink.

2. To make up for the inadequacy of printing technology, because of printing each working procedure in the whole process of error, equipment maintenance, operation environment, the problem such as think omissions and mechanical wear, result in printed below 153 small outlets, it is difficult to get a smooth uniform dot color, at this time we can use the full version of the same colour tinted (i.e., the color field) to replace the small branches do printing, can more easily get flat large area color piece. In addition, sometimes in order to clearly show fine figure, and as a finer strokes of mixed color graphic or the white line and so on, also often use the color processing in order to fine line can really enough and exquisite.

Some questions to be noted before printing:

1. Uniform color name: in different software, the name may be different for exactly the same two types of colors. For example, FreeHand named PANTONGEI1F as PANTONE1F5CVC or PANIONE1F5CVV, while PageMaker was named PANTONE1F5CV. In this way, when the FreeHand graphic object is placed in PageMaker, the same color will have three names, and the color output will produce three plates, resulting in an output error. Therefore, if the data file needs to be used in more than two kinds of software, it must be noted that the use name of the same spot color must be unified before the integrated color output. The more commonly used method is the name of the color in the row, and the name of the same spot is renamed as the unified name in the palette of various software.

2. The Angle of the spot color plus network: in general, the spot color is printed in the field, and the dot processing is rarely done. Therefore, it is seldom mentioned that the Angle of spot color and net is seldom mentioned. However, when using the color shallow network, there will be the design and modification of the network Angle of the spot. If there is a mesh point of color and the Angle of the color of the other dot printing Angle is less than 30 degrees, there will be a collision net or the production of a tattoo; If the Angle overlaps with each other, it will cause the ink to overprint the problem, which will cause the printing color of the serious distortion. In addition, the color and network perspective in turn a generally default to 45 degrees (45 degrees were considered to be the most comfortable Angle, the human eye perception to node arrangement and horizontal and vertical lines into equal Angle in the direction of the network can reduce the human eyes perceive ability), if a two-tone images or data files in both printed four color black outside (usually in four color and network printing, put black spots, yellow to 0 degrees 45 degrees, magenta is 15 degrees, blue is 75 degrees), and two or more color, the color or are at 45 degrees on the color separation and network output, therefore, when the color to use shallow network, if it is possible with other colors have dieyin, you must open software to produce color separation output color setting or print setting dialog box, color and Angle modified network.

3. Color printing to the transformation of four color: many designers when doing graphic design tend to use some specially in the library every color to define the color and shading treatment, and in color separation and converts them into CMYK four-color printing. At this point, three points need to be noticed: one is that the color field is larger than the printed four color field. In the transformation process, some spot colors cannot be completely guaranteed, and some color information will be lost. Second, it is necessary to choose "spot color conversion to four colors" in the output, otherwise the output error will be caused. 3 it is to don't think that the color of the Numbers show CMYK color value ratio can let us in the same CMYK composition of four color printing ink shows the effect of the color (if you can needless color) if it did, in fact the color will be of great difference in hue.

4. The color trap processing: because of the color printing is different from four color (four color printing ink on mutual superimpose generated three, namely the ink transparency), when used usually can't be generated in two color dieyin a three, intuitively that would get very dirty color effect (of course there are exceptions, such as in the design to use the color of need, superposition of hybrid integrated the third color, this third color color full, but in the heavy, such as: the color yellow embossed on the modulation of the color red, two colors after integrated to produce a sedate crimson, commonly used for the cover of the book, etc.), therefore, define the color, generally don't use dieyin (Overprint) way instead let empty (Keepaway). In this way, when using spot color, as long as there are other colors next to the spot color, it should be considered to make appropriate trap processing to prevent the occurrence of the problem.

5. Spot color matching system.

When choosing computer color matching system, first of all, what is the color system, should be clear what is CMYK four-color printing system, in order that you can choose color in the color separation in the system whether there will be the output of the color conversion and whether there will be color distortion. So: that is commonly used in graphics software have PANTONE COLOR matching system, TRUMATCH, FOCOLTONE, TOYOCorlorFinder, ANPA - COLOR, RICCorlorGuide etc, including TRUMATCH, FOCOLTONE and ANPA - COLOR developed on the basis of the four COLOR printing system, others are part of the system of the COLOR (PANTONE system, covers noodles wide, both the four COLOR printing, also have the COLOR). This means that the PANTONE color, TOYOColorFinder and RICColorGuide these color color matching system, there are many color is beyond four colored printing field, can't use the four color printing ink reappear, the system to provide is only CMYK combination numerical approximation.

Therefore, if we choose the color of the spot color matching system, and print four color separations output; Or refer to the corresponding CMYK combination values that are approximately displayed in the bear, and use these values to replace the original spot color with the printed four colors, which will definitely lead to color distortion. Secondly, we should understand the color color matching system was in a colour separation, unless specifically set the color will be converted to CMYK four-color to output, otherwise, every use of the color will automatically be independently into a color version. Likewise, the colors used in coloring printing four color color matching system, in the color separation output will be automatically according to the matching numerical CMYK color itself as to the four plate, and won't produce more of the color version.

Moreover, note: within the lattice chart environment, chooses color such as color after use to the canvas, application and will be automatically converted into the color of the data file of the same color pattern (such as CMYK four-color mode). So in the bitmap drawing software, for the color, have to deliberately add or specified (such as: Photoshop to establish and define the color, can have two kinds of situations: if the color will be as a kind of color is applied to the whole image, the image must be converted to double tonal patterns, and the application on one of the double color plate color; If the spot color is used for the specific area of the image, the spot color channel must be created. In vector drawing environment, if choose or define a color, the color is always exist in the attribute of color, unless specifically the color printing properties change or converted into color (such as: add in Illustrator and define a color, even if be referenced to other Illustrator data file or will use the color data files opened by other vector software, such as the color attributes will change the color).

6. The cost of spot color printing.

General spot color printing is usually used for printing under three colors. If you need more than four-color printing, CMYK four-color printing is preferred. Because CMYK four-color printing are basic presented outlets dieyin, and use the color printing base to the ground, although usually color only in the image of local use, but, when a habit is to general ink twice the price to estimate; In addition, if the same had four color printing color pages, and more for printing a color, if printing and no spare unit (such as less than four color printing machine or four-color printing press), and then to spend double time to printing, with high cost.

In a word, the use of spot color should be especially careful, otherwise it will not only create color distortion, spoil your creativity and design, but also increase economic expenditure and unnecessary time waste. Therefore, for your cost control, the constant pine color center provides a feasible and optimized color scheme to provide you with more accurate print colors.