What is the difference between four color printing and spot color printing?
Time:2024-05-08
Views:852
We often hear the words four-color printing and spot-color printing, which are widely used in albums, books and leaflets, and so on in the paper and other printed materials.
But most people are not clear in the actual production of what circumstances should choose four-color printing, what circumstances should choose spot-color printing.
Today, we explore with you from the concept, the difference to the application of spot color printing and four-color printing, come and learn it.
Four-color printing
Four-color printing is the use of CMYK (cyan, magenta, yellow, black) four-color overprint out of the color you need.
Colloquially speaking, that is, the use of these four colors of different superimposed to get the color you need, as long as the color gradient are four-color overprinting out.
Four-color printing is superimposed out of the dots, with a magnifying glass can see the different colors of the dots.
Spot Color Printing
Spot color printing refers to the use of yellow, magenta, cyan, black ink other than four-color ink to copy the original color printing process.
Spot color printing process is often used in packaging printing to print large areas of the base color. Spot color printing is a single color, there is no gradient, the pattern is the field, with a magnifying glass can not see the dot. (Generally speaking, the cost of spot color printing is slightly higher.)
What products must use four-color printing process
Color photography to reflect the colorful nature of the color changes in the photographs, painters of color artwork or other images containing many different colors, for the process requirements or for economic efficiency considerations, must be scanned by the electronic color separator or color desktop system color separation, and then use the four-color printing process to reproduce the completion of the process.
What kind of products will use spot color printing
Part of the packaging products or book covers, album covers are often composed of uniform blocks of different colors or regular gradient blocks of color and text, these blocks of color and text can be divided into four primary colors after ink overprinting and become, you can also deploy spot-color ink, and then in the same color block at the same spot-color ink printing only a certain kind of ink. In the comprehensive consideration of improving the quality of printing and save the number of overprints, often use spot-color printing. Packaging printing often use spot color printing large areas of the base color.
Spot-color printing, four-color overprinting visual effect of what is different
Spot color printing color brightness is low, high saturation; ink uniform spot color block is usually used in the field printing, to appropriately increase the amount of ink, when the layout of the ink layer thickness is large, the ink layer thickness changes on the color changes in the degree of sensitivity will be reduced, so it‘s easier to get the ink uniformity, thick printing effect.
The use of four-color printing process overprinted color block, easy due to changes in the thickness of the ink layer and changes in printing process conditions caused by changes in color intensity. Changes in the degree of expansion of the dot, resulting in color changes. Therefore, the use of four-color printing process overprint color block, it is not easy to obtain the effect of uniform ink color.
From the point of view of economic efficiency, mainly depends on the use of spot-color printing process can save the number of overprinting. Because reducing the number of overprints can save printing costs, but also to save the cost of pre-press production.
If a product of the screen both color levels of the screen, and a large area of the background color, the color levels of the screen part of the four-color printing can be used, while the large area of the background color can be used spot-color printing.
Spot Color Ink
It is a kind of pre-mixed specific color ink, such as fluorescent yellow, pearl blue, metallic gold and silver ink, etc. It is not printed by CMYK four-color overlay, and overlay implies the exact color.
It has the following three characteristics:
Accuracy
Each color overlay has its own fixed hue, so it can guarantee the accuracy of color in printing, thus solving the problem of color transfer accuracy to a large extent.
Fieldness
Spot colors are generally defined in terms of a field color, regardless of how light that color is. Of course, it is also possible to screen (Tint) a spot color to present any shade of the spot color.
Wide Expression Color Gamut
The color gamut in the color set library is very wide, exceeding the performance gamut of RGB, not to mention the CMYK color space, so there is a large portion of colors that cannot be rendered with CMYK four-color printing inks.
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