Do you still use the color of the register for printing? Isn t it okay to have four colors?

The most outstanding achievement of engraving printing in the later development is the unique color overprint.

Chromatic printing is a complex, highly sophisticated technique. For example, if you want to print red and black, you should first take a plate and engrave the words that need to be printed in black in the appropriate place. In addition, take a plate of the exact same size, and engrave the words that need to be printed in red in the appropriate place. Each edition is not the full text.

When printing, first print a piece of plate with a color; Then the paper is covered on another plate, so that the frame fits perfectly with each other, and then another color is printed, and a two-color color print is completed. If you are careless when printing, if the two plates do not coincide, or if the position of the words on the two plates is not accurately calculated when engraving, then after printing, the words of the two colors will be uneven and cannot be read. If you want to set a variety of colors, you can do it in this way, but the more colors you have, the more laborious it is to print, so you need to be extremely skilled.

If the book is overprinted in various colors, if it is printed on white paper, it is really bright and dazzling, and it is beautiful! This method of overprinting was invented in the Yuan Dynasty in the 14th century AD at the latest. In the Yuan Dynasty, Zhongxing Road (now Jiangling, Hubei) engraved the "Diamond Sutra Notes", which was overprinted with vermilion and ink, which is the earliest existing color printing.

However, it was not until the end of the 16th century that this method became widely popular.

This color matching technique, combined with the printmaking technique, produces a brilliant color matching print. At the end of the Ming Dynasty, the original "Ten Bamboo Zhai Paintings" and "Notes" are good samples. A printlet presents a variety of colors, light and dark, yin and yang to the back, all of which are meticulously detailed.

Some ancient prints are indeed artistic treasures.

Four-color printing, using the subtractive color method of three primary colors (yellow, magenta, cyan) and black printing. If the printing process of reproducing the color of the original is made with inks other than yellow, magenta, cyan, and black ink, it should not be called "four-color printing" but "spot color printing" or "dot color printing".

Six-color printing (hexachrome), which is a printing method developed by Pantone in the United States in 1995 using a unique 6-color ink. In addition to black and blue, other inks contain fluorescent pigments, which are characterized by very vivid colors.

According to Pantone's design, the six types of inks used are cyan, magenta, yellow, black, orange, and green inks.

Theoretically speaking, as long as the three primary colors are used, any color can be synthesized (that is to say, any color is synthesized from the three primary colors, and the color TV is synthesized into various gorgeous and colorful images with the tricolor electron gun). So both four-color printers and six-color printers can print a variety of colors, not that four-color printers can only play four colors, and six-color printers can only play six colors. However, the ink cartridge has more colors and higher accuracy, so generally speaking, the printing quality of a six-color printer is better than that of a four-color printer.

However, this is not absolute, and there are other factors that affect the quality of the print. For example, various three-color, four-color or six-color printers have different grades and different printing quality, so you have to look at the quality indicators of the printer. The specific choice of printer should be determined according to your print quality requirements.

Theoretically, three colors are enough (three primary colors), but in practice we chose four colors (c m y k) in order to make the colors look more vivid and intense.

From the cost point of view, 4 colors have a lot of advantages over 6 colors (since 4 colors are behavior, why choose 6 colors?) ）

It is not that there are no 6-color products, depending on the specific requirements of the product designer.

Printing using cyan (C), magenta (M) and yellow (Y) three primary colors can produce different colors, the less colors the more convenient, the more economical, the addition of 2 colors is the simplest. The sum of the three primary colors is black. For convenience, use black directly, which is 4 colors.

Ordinary printing 4 colors can be satisfied.

Printing is divided into spot color and four-color printing, spot color printing is more expensive, that is, a color with a kind of ink, printed out of Qi Qing this color is clear and realistic.

Four-color printing is four colors (cyan, magenta, yellow, black) Gao Xun superimposed printing, for example, the red on the design draft can be superimposed with magenta and yellow to print.

Since the printing press can only add four colors at a time, if the spot color is used, the color is more than four, then the trace needs to be printed twice, ** is high, the four-color printing effect is worse than the spot color, but the average person can not see, the four-color printing can be printed at one time, which is more economical.

For example, if the big red (M100, Y100) or light red (M80, Y60) is a two-sheet plate directly, the printing is two-color printing, and if it is a monochrome machine, it needs to be printed twice, and it is superimposed to produce a large red. Change to spot color (M100, no matter what color value the original file is, here it is adjusted to 100%) plate making is a plate, printing is monochrome printing, saving a plate, need to print with ink. If you want to mix spot colors, the darkest part of a color must be 100%, which is the most important thing.

I don't know if you can make it clear that four-color printing is made of CMYK color superposition, and there is no need for someone to mix the ink with a high degree of work. If it's not clear, you can go to the machine and see how the printing press works.

Similarity between printing and original, color density, accuracy of overprinting, and adoption.

1. Four-color registration; 2. Saturation of color; 3. Compare with color samples; 4. The primary color is printed to the standard density.

Dot density, dot increase, relative contrast, overprint accuracy, overprint rate.

The so-called four-color refers to a printing process, of course, it can also be used for graphic design and other color matching processes, which is a broad concept. Normal four-color refers to normal four-color printing: that is, the printing process of Fuqing using yellow, magenta, blue primary color ink and black ink to reproduce the color of the original.

And because the blue and blue are similar, the four colors have produced a popular saying in many places: black, red, blue, and yellow. Four-color printing is also known as CMYK printing method.

Outside of the 4 colors, spot colors are used. The four-color is to divide a ** into CMYK four color plates to print, and the color of the finished product that lacks a simple grip is basically the same as the original picture. Spot color refers to spot color printing, which refers to the printing process of using other color inks other than yellow, magenta, blue and black ink to reproduce the color of the original.

Four-color printing: Printing with subtractive color three primary colors (yellow, magenta, cyan) and black.

If the printing process of reproducing the color of the original is made with inks other than yellow, magenta, cyan, and black ink, it should not be called "four-color printing" but "spot color printing" or "dot color printing". Spot color printing refers to the printing process of using inks other than yellow, magenta, cyan and black ink to reproduce the color of the original.