Technical question and answer for ink color deployment in color printing

In order to make the packaging printers and ink manufacturers master, use, and deploy the ink hue, according to their own experience, the author should promptly respond to questions raised by hundreds of ink and printing company customers in the country. I also requested corrections.

1. What is the optical property of the printing ink ink film?

In packaging printing ink systems, the binder is colorless or has a slightly colored plastic fluid. The refractive index of the linking material is very close to the refractive index of water, so the linking material has a certain degree of transparency. When we add color and filler, because the color and the filler block the injection of light, the ink film will be reflected again and it will happen. A series of optical changes result in the optical properties of the ink film of the printed ink.

2. How is the mixed color (or polychromatic) established?

When people tried and verified, they found that when daylight hits a yellow color ink ink film, it means that it absorbs the blue spectrum of sunlight and emits yellow and green light. However, when the reflected yellow or green light meets the blue pigment particles, it will reflect blue light and absorb only the green light. Therefore, after a series of reflections and refractions, only the green ink ink film can be embodied. Therefore, it is said that the color mixing of such printing inks is a subtractive mixing, that is, they absorb each other's desired wavelengths and are not reflected by the absorbed spectrum. This is the origin of the mixed colors (established).

3. In the packaging printing ink, how do the subtraction of the three primary colors and the addition of the natural world differentiate?

In China's packaging printing ink industry, due to the use of subtractive principles, we use the complementary colors of the three primary colors - that is, subtractive primary colors (red complementary colors are green, green complementary colors are magenta, and blue complementary colors are yellow). We use three subtraction methods. The magenta, cyan, and yellow colors in the primary colors overlap to form black (at high densities), and various mixed colors formed when the three density changes. In order to avoid conceptual confusion, the three primary colors of natural addition are red, green, and blue. Therefore, we cannot simplify the three primary colors of packaging printing inks to red, yellow, and blue. In a word, red does not mean magenta, and blue does not mean blue. This is the de facto difference and difference between the three primary colors of subtraction and addition.
4. What are the three primary colors of printing ink? What are the three colors of printing ink? What is the four-color printing ink?

(1) Three primary colors - yellow, magenta, and blue;
(2) Three colors - red, green, and blue;
(3) Four complex colors - purple, bronze, olive green, and black.

5, how can we master the principle of subtractive difference? What is the basics?

Because our packaging and decorating designers need color configuration, we are often fully conceived in terms of printing colors. From the three primary colors, three colors, and four multi-colors, we can combine them into another new form of expression. Just as people are familiar with the different ink color hue (hue), different ink brightness, different ink saturation combinations together, it will give people a beautiful and harmonious feeling. The rhythm of printing ink color also has its most basic rule, often divided into warm and cool colors. The author's warm colors are: red, orange, and yellow; and the cool colors are: green, blue, blue, and purple. In addition, in addition to warm and cool colors, there are neutral colors of light purple, light gray and so on. We know that different printing ink color shades will give people different feelings, and will use different colors of packaging printing inks to trigger people's different mood descriptions and descriptions. For example, the white ink film symbolizes purity and simplicity; the red ink film is festive, passionate, and just; the yellow ink film enables people to be excited; the cyan ink film often shows tranquility and long-range; and the gray ink film does give people a degree of balance and balance.

With the exception of the three primary colors, the vast majority are compound colors, and the composite hue itself is a science. The final color of the packaging and printing graphic arts used in the preparation of packaging and printing is to verify the effect by using visual inspection. But the starting point can not be separated from the color of printing inks, especially the aesthetics of color. Therefore, the choice of printing color must be closely related to the environment. This is the basic knowledge of the basic principle of subtractive coloring.

6. How to make use of graphic decoration of printing ink to improve the quality of work and life?

Whether the warmth gives people a feeling of brightening, warmth, or psychological balance, or whether the coldness gives people a feeling of contraction, subtlety, gentle solemnity, and mental calmness. In the world of humanity, we cannot always be in the same strong atmosphere and we need certain regulators. For example, a strong color decoration environment will make people tired or annoyed, and in a dark environment will make people feel depressed. Our decorator designers and packaging printers are using the printed decoration colors to give consumers the goods they need, decorating their colorful and colorful ink colors, constantly adjusting people’s work and living environment, and giving people Benign stimulation will help improve the quality of work and life.
In daily life, we only need to focus on the theme of adjusting work and living environment space. We will often store several colors or coexist in shallow, medium, and deep levels for the packaging and decoration of products in the same environment. Therefore, the use of harmony between colors and the use of different levels has always been the central subject of our research. For example, the complementary (red and green) colors (the sum of the two hues equals white) may sometimes give people a cheesy or even dirty feeling. Good deployment will give people a feeling of strong and eye-catching and even pay attention to cleanliness and hygiene. Another example is the light yellow with reddish brown, often due to the close color between yellow and red, and the similar color can give people a harmonious beauty. There are dark green and light green, fresh and not dazzling. In recent years, people use the method of achromatic and color at the same time, giving people a bright feeling and protecting the vision. When the three colors red, white, and blue are the same, they appear on a single package, giving people the impression that the red is warm, the white is pure, and the blue is solemn, reflecting the beauty of a kind of goods and materials.

Therefore, the author said with deep feeling: In the 1980s, the colors and varieties of printing inks were used in the 1990s. The inks used in the 1990s were inexpensive and of high quality. In the 21st century, they were used for packaging printing inks. It is safe and healthy.

7. What is the meaning of color chromatics in printing inks?

The color theory of packaging printing inks is that the color of printing inks cannot be separated from physics, physiology and psychology. Simply put, the colors we study for a long time are often dictated by psychological feelings, because once printed on the surface of the substrate, the packaging printing ink can not only improve the performance of the substrate, but also give various colors to the object, and the color of the printing ink. It depends on the choice and composition of the pigment. For thousands of years, humans have developed new ink color varieties and improved the quality of traditional color hue for the needs of commodities and commodity packaging.

We know that the color of the printing ink on the surface of the substrate is often restricted by its own chroma. If it is green, red, white, etc under the standard light source, if the ambient light or different lighting conditions, the ink film is printed on the ink. Will show different results. The color of the surface decoration of any kind of packaged printing object is not visible at all. As a package printing worker or printing ink manufacturer, in order to fully reflect the benefits of printing ink color, it should be based on the knowledge of color chromaticity, etc. Constantly studying the artistic concept of the color change of the printing ink graphic ink film can guide the printing ink color printing operation and the ink manufacturing.

8. What is the concept of metamerism in printing and decorating?

To meet the needs of color varieties for packaging printing inks, it is not sufficient to rely on only a few colors. The finished color inks in the market basically require serialization, which must be achieved through a certain color matching process. A new color hue is obtained by the printing of the multi-color or multi-color, which is in line with the normal packaging and printing law, but also with the color matching rules.

In order to achieve the above requirements, people proposed the concept of metamerism color. Usually people practice, the metamerism concept is only useful for specific standard observers, but not for color blind people (physiological obstacles). Same metamerism refers to the same stimulation value of the color of the printing ink, the distribution of the spectrum is different, and the color of the ink sample is different, which is very important for color matching of the packaging printing ink. We can only achieve a certain degree of approximation in the actual color matching, and can be assessed by the spectral reflectance factor curve shape of the sample. From a qualitative point of view, the more similar, more coincident the reflectance factor curves of the two samples are, the more intersections are, and the more the color hue of the prepared sample can be shown to be close to the sample. If the assessment is performed from a quantitative point of view, the outstanding difference can be calculated from the chroma of the two ink samples—that is, how much of their metamerism.

For package printing ink formulation color or packaging printing ink formula designers, if the qualitative analysis is made by means of a colorimeter and a reflectance factor curve made when color matching, it can be quantitatively analyzed through color difference (AE).

9. Why is the competition of ink companies focused on color, followed by adhesion and gloss?

In modern packaging and printing products, it is essential to retain old customers or to seize the commanding heights of their science and technology. The key is color. Individual operators (including decorators) only believe in experience, do not care about scientific theory, or always talk empty about scientific theory, and do not pay attention to craftsmanship. When ink printing and printing samples are sent to customers, they are either inaccurate or susceptible to oxidation. Excessive standards, not the time is too long, is the high cost of printed materials, do not understand this minimum content of the original intention of competition - out of color deployment is not allowed, or dull print, or time is too long, or high cost, even more than a certain An environmental protection standard is a waste of opportunities for companies or new products to try. For this reason, the author has a deep understanding of the advantages of color deployment is the market to measure the level of a packaging and printing companies and even printing ink companies.

In addition to color deployment, commodity packaging users have high gloss and good attachment fastness as the basic elements.
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10, how to deploy other colors from the three primary colors hue?

Usually the three primary colors can be formulated with the following ink hue:
No. Name Primary Color Red (Magenta) Primary Color Yellow (Yellow) Primary Color Blue (Green) Ratio Hue
A/1 color 50.0 50.0 1:1:0 red
2 colors 25.0 75.0 1:3:0 dark yellow
3 colors 75.0 25.0 3:1:0 golden red
4 colors 20.0 80.0 1:4:0 orange
5 colors 10.0 90.0 1:9:0 orange
6 colors 1.0 99.0 1:99:0 dark yellow
7 colors 25.0 75.0 1:0:3 dark blue purple
8 colors 50.0 50.0 1:0:1 dark blue
9 colors 75.0 25.0 3:0:1 Hong Qinglian
10 colors 50.0 50.0 0:1:1 green
11 colors 75.0 25.0 0:3:1 green
12 colors 80.0 20.0 0:4:1 Apple Green
13 colors 25.0 75.0 0:1:3 dark green
B/14 Duplex 50.0 25.0 25.0 2:1:1 Brown Red
15 Duplex 66.68 16.67 16.67 4:1:1 Red Brown
16 complex color 25.0 25.0 50.0 1:1:2 olive
17 Complex color 16.67 16.67 66.68 1:1:4 dark dark green
18 Duplex 33.3 33.3 33.3 1:1:1 black (approximate)
19 Complex color 20.0 40.0 40.0 1:2:2 dark green
20 complex color 20.0 70.0 10.0 2:7:1 brown
21 Complex color 25.0 50.0 25.0 1:2:1 Bronze description: (1) 13 inter-color, actually 12 (due to both methods are dark yellow) color;
(2) Black can only be approximate;
(3) Bronze - usually known as red;
(4) Strictly speaking, the primary colors are inks that can only be selected from one color in the ink system. Because the pigments in the market are difficult to meet the requirements of the three primary colors, and the color hue of the pigments is not uniform, the color difference (value) occurs. Generally, the ink manufacturers are based on the Printed user's printing requirements, and the amount of additional complementary color manufacturing, which is the printing of color in the three primary colors (overprinting effect) called ink. Two colors are called inter-color and three or more are poly-color. However, in the ink system, there is often a certain amount of complementary colors to meet the requirements for packaging and printing products.

11. What colors affect the color cleanliness of overprinting in three primary ink printing?
E.g:

(1) When printed in yellow, the red, orange, and green inks affect the cleanliness, and the red ones are more dirty than the dirty ones.
(2) In the case of red prints, the red, orange, yellow, and green inks affect the cleanliness, and the redlines are still relatively dirty.
(3) In cyan, the cleanliness is blue, purple, and green, and the dirty version is