Definition and use of spot color printing and four-color printing
How much do you know about spot color printing and four-color printing? The following Chinese printers who can provide you with high-quality printing service China will take you to understand this problem.
1. What is four-color printing?
The four-color printing process generally refers to the full-color business card printing process in which the three primary colors of yellow, magenta, and cyan ink and black ink are used to reproduce various colors of color manuscripts.
2. What is spot color printing?
Spot color printing refers to the use of yellow, magenta, and cyan full-color business card printing and printing. A printing process in which inks of colors other than black ink four-color inks are used to replicate the colors of the original manuscript. The spot color printing process is often used in packaging printing to print a large area of background color.
3. What product must use a four-color printing process?
Photographs taken by color photography that reflect the rich and colorful color changes in nature, color art works of painters, or other pictures containing many different colors, due to technical requirements or economic considerations, must go through An electronic color separation machine or a color desktop system scans the color separation, and then uses a four-color printing process to copy and complete.
4. What kind of products will use spot color printing?
The cover of packaged products or books and periodicals is often composed of uniform color blocks of different colors or regular gradient color blocks and text. These color blocks and text can be overprinted with four primary color inks after color separation. Spot color inks can also be blended. , And then print only one spot color ink on the same color block. In the case of comprehensive consideration of improving printing quality and saving overprinting times, spot color printing is sometimes used.
5. What is the difference between the visual effects of the spot color printing color block and the four-color overprinting color block?
The ink formulated by spot color printing is obtained according to the principle of color subtractive mixing of pigments, with low color brightness and high saturation: spot color blocks with uniform ink color are usually printed on the spot, and the amount of ink should be increased appropriately When the thickness of the ink layer on the layout is large, the sensitivity of the change of the ink layer thickness to color changes will be reduced, so it is easier to obtain a uniform and thick printing effect.
The color block printed by the four-color printing process, because the various colors that make up the color block are mostly composed of a certain proportion of dots, when printing the dots, the thickness of the ink layer must be strictly controlled, which is easy to change and print due to the thickness of the ink layer. Changes in process conditions cause color intensity to change in full-color business card printing. Changes in the degree of expansion of outlets. This causes the color to change. Moreover, since the change of any one of the colors of the color block will cause the color of the color block to change, the chance of uneven ink color will be doubled. Therefore, the color block printed by the four-color printing process is not easy to obtain the ink color. Uniform effect. If you can't use a multi-color machine to overprint the color of the color block at one time. It is also prone to color shift because the color of the semi-finished product is not easy to control. In addition, the four-color printing obtains the comprehensive effect of the subtractive color absorption of the dots and the additive color mixing, and the color block has higher brightness and lower saturation. For light color blocks, the four-color printing process is adopted. Due to the low coverage of the ink on the paper, the ink color is flat and lacks a thick feeling. Due to the angle of the dots, the presence of patterns will inevitably be felt.
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