What is the color of the various network cables of the printing four color printing PS plate?

It depends on the contrast of the network cable.

The printing is four-color output, with CMYK color mode.

Printing is additive color principle, so it is CMYK;

RGB is the principle of subtractive color, so the computer display is RGB.

You said, RGB colors look more vivid and beautiful than CMYK colors, and that's true! Because the CMYK color is composed of four colors, all the color combinations are very limited, more than ten times less than the combination of RGB colors, so from RGB colors to CMYK colors, you will immediately feel that the color has become gray, as if a lot of dust has accumulated, especially bright red, lake blue, and bright green are more obvious. But this is only the difference in color display, as long as the value of the color is accurate, the staff will give you a proofread color when printing, it does not necessarily mean that the color you see looks gray and old, and the printing will also be so ugly, which you can rest assured.

If you choose RGB, the color will be larger.

There are four-color printing and spot color printing. Spot color printing refers to the printing process of using yellow, magenta, cyan, and black ink to reproduce the color of the original manuscript with other colors of ink. Adopt it in a timely manner.

568B standard: white orange, orange, white-green, blue, white-blue, green, white-brown, brown.

Printing four colors use the sample table to see the color.

1. The intensity of light directly affects the judgment of the color of the printed sample.

The intensity of light not only affects the brightness and darkness of the color, but also changes the physiognomy of the color.

Usually we observe a light-receiving cylinder, the light-welcoming side is the light tone, and the backlit side is the dark tone. Knots of light and dark.

The conjunct is the middle tone. The same object is a normal color under a standard light source, and if the light gradually becomes stronger, its hue will also change to a bright hue, and the brightness will increase to a certain extent, and any color can become white. Black.

The reflective point of porcelain is also white, because the light is concentrated at the reflective point and reflects strongly. In the same way, the light gradually decreases, and the various colors change to hues with low brightness, and the light weakens to a certain extent, and any color will become black, depending on the object.

The body does not reflect any light, and it is black.

The sample table in the printing workshop must meet the requirements, and the illumination is generally required to reach about 100lx in order to correctly identify the color.

Second, there is a difference between the sample under color light and the sample under daylight.

In actual production, most of them work under the illumination of light sources, and each light source has a certain color. This brings certain difficulties to the correct judgment of the color of the original or product, the color change is generally the same color becomes lighter, and the complementary color becomes darker, for example: red light viewing, red becomes light, yellow becomes orange, green becomes dark, blue becomes dark, white turns red.

Under green light, green becomes light, blue becomes light, yellow turns green and yellow, red turns black, and white turns green.

Under yellow light, yellow turns light, magenta turns red, blue turns green, blue turns black, and white turns yellow.

Under blue light, blue becomes light, blue becomes light, green becomes dark, yellow turns black, and white turns blue.

In the printing workshop, fluorescent lamps with higher color temperature (3500 4100K) and better color rendering coefficient are generally selected.

It is a sample light source, but note that the fluorescent lamp is slightly blue-purple. At present, various standards in the printing industry require the use of D65 standard light source for color reading.

3. Look at the sample first and then look at the print and then look at the sample first, the result will be slightly different, and the feeling is different when you look at one color twice. This phenomenon is called the sequential color contrast reaction.

Why does the sequential color contrast reaction occur? This is because the color that looks first makes the color of the color nerve fibers.

Excited, immediately look at other colors, other color nerves quickly excite to cause color perception, and the color nerve that looks at the color first is in.

The inhibition state after excitation, and the re-excitation is slower, causing a negative hue reaction. This reaction, combined with the hue of the new color, forms a new color, so the color of the back color is changed.

Moreover, the hue of the change is still regular, and it is a change in the complementary color aspect of the color that looks at the color first.

Look at the data of the percentage of four-color dots (in PS, you can open the four-color value at the location of the icon in the "Info" window), and then correspond to the printing chromatography to see the actual color.

The easiest thing is to check the amount of four-color solid ink on the color scale. It's also experience.

Hello! What do you mean? Hue? Lightness? Saturation?

If you see more, you will have experience, and if you have more experience, you will have it.

The designer who does the document does not care about the printing color separation, and the spot color is after printing and printing, please confirm the customer, and the special machine can print it.

To show the customer, it is to see the overall printing and display effect, not the color separation.

Color separation is generally an automatic color separation where the film is produced. That is, you give the finished documents to others, and then give you the film, don't bother you, and then you can print it when you go to the printing house.

1.Open the image in PS.

2.Image - Mode - CMYK Color.

3.Storage.

We usually say four colors refer to 4 total color values, they can be mixed into many colors, if you are similar to the task, you can't adjust, because you must use 4 color printing, the so-called three-color printing is generally used in a single color block to color printing, such as the yellow background sunspot plus blue logo, and the current printing ** is not necessary to divide into 3 colors and 4 colors.

The CMYK four-color diagram is a process color, and the 4 color channels represent the 4 printing plates.

You can convert the image mode to RGB and print it on spot color printing plates.

Use photoshop to deal with it, you see that the color value in the channel is small, so you use the calculation function to deal with the color of the channel, and add the color value to the other three color values, relying on experience to operate. At first, it still couldn't be adjusted all at once.

In Photoshop processing, use GCR curve conversion, black version selection none on it.

Tricolor and tetracolor are both composed of a color mode, the difference is that tricolor is divided according to the light primary color, type in our display, light and other four colors similar to our printing pigment a color mode.

Tricolor RGB based.

Bai Natural Color is mainly used in TVs and computer displays almost including DAOs

All the colors that can be perceived by the human eye.

The four-color CMYK is based on the printed volume.

Natural colors are definitely richer than printed colors. The colors of printing are not as rich as those in nature, and the difference can be seen on the computer.

RGB can't be displayed in many colors, and CMYK can't be displayed.

So just keep in mind that the tricolor mode is mainly used for TVs and computer monitors, and the printed ones are all CMYK

In addition, RGB colors have a larger color range than CMYK.

The 3 colors are what you see on the computer.

The 4 colors are for printing.

CMYK mode.

CMYK mode is a print mode. C for cyan, M for magenta, Y for yellow, and K for black. Images to be printed are usually converted to CMYK mode at the time of output.

Four colors. cmyk

C for cyan, M for magenta, Y for yellow, and K for black.

Article, words in 100 black.

TIFF format files in CMYK mode. JPG files are lossy compressed; TIFF is lossless compression, but the file size will be much larger.

Supplement. 1. Color mode.

2. Grayscale mode for black and white.