Several technical problems in ink color matching in color printing
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In order to make the packaging and ink manufacturers master, use and mix the ink hue, the author should respond to the questions raised by hundreds of domestic ink and printing enterprise customers in the near future according to their own experience. I also requested corrections.
1. How is the optical properties of the printing ink film formed?
In packaging printing ink systems, the binder is colorless or has a tinted plastic liquid. The refractive index of the binder and the refractive index of water are very close, so the binder has a certain transparency. When we add the pigment and the filler, the ink film is reflected again because the pigment and filler block the injection of light, and it will occur. A series of optical changes that result in the optical properties of the ink film of the printing ink.
2. How is the mixed color (or complex color) established?
When people test and compare the evidence, it is found that when sunlight is injected into the yellow color ink ink film, it means that it absorbs the blue spectrum in sunlight and emits yellow and green. However, when the reflected yellow or green light encounters the blue pigment particles, it will be reflected to the blue light to absorb only the remaining green light. Thus, after a series of reflections and refractions, only the green ink ink film can be embodied. Therefore, it is said that the mixing of the color of the printing ink is a mixture of reduction--that is, mutually absorbing the wavelengths required by each other, and the spectrum that is not absorbed by the Chinese gold-package network is reflected. This is the origin of the mixed color (established).
3. How is the subtraction of the three primary colors and the addition of the natural world in the packaging printing ink?
In China's packaging printing ink industry, due to the use of the principle of subtraction, the use of the complementary colors of the three primary colors - that is, the subtraction of the three primary colors (red complementary color is green, green complementary color is magenta, blue complementary color is yellow), we are using 3 subtractions The magenta, cyan, and yellow colors in the primary color overlap to form a black color (at a high density), and various mixed colors formed when the density of the three changes. In order to avoid conceptual mixing, the three primary colors of the addition of nature are red, green and blue. Therefore, we cannot simplify the three primary colors of packaging printing inks into red, yellow and blue. In a word: red is not equal to magenta, blue is not equal to green, which is the de facto different concepts and differences 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 complex colors of printing ink?
(1) Three primary colors - namely yellow, magenta, and blue;
(2) Three colors - red, green and blue;
(3) Four complex colors - namely purple, bronze, olive green, black.
5. How can I master the principle of reduction? What is the basic knowledge?
Because our packaging, printing and decorating designers need color configuration, we often fully conceive the printing color, and can be combined into a new expression from the three primary colors, three colors, and four complex colors. Just as people are familiar with the different ink color hue (hue), different ink brightness, different ink chroma combination, it will also give a beautiful soft and harmonious feeling. The rhythm of printing ink color also has its most basic rules, often divided into warm and cool colors. The warm colors that the author speaks are: red, orange, and yellow; and the cool colors are: green, blue, blue, and purple. In addition, in addition to warm, cool colors, (China Golden Packet Network is a professional metal printing and packaging industry portal) there are neutral colors of light purple, light gray and so on. We know that the color tone of different printing inks will give people different feelings, and will describe and describe the different moods of people in various colors. For example, the white ink film symbolizes purity and simplicity; the red ink film is festive, enthusiasm and justice; the yellow ink film makes people excited; the cyan ink film often reflects tranquility and far-reaching; and the gray ink film does give people a generous and balanced.
Except for the three primary colors, the vast majority are composite colors, and the composite color itself is a science.
The color of the packaged printed graphic text is finally determined by visual inspection to determine its effect - good or bad. But the starting point is inseparable from the color science of printing inks, especially color aesthetics. Therefore, the choice of printing color must be closely related to the environment, which is the basic knowledge of the basic principles of subtractive color.
6. How to use the graphic decoration of printing ink to improve the quality of work and life?
Whether it is warm or warm, it is the expansion of lightness, warmth and psychological balance; or the feeling of cold color is contraction, elegance, softness and calmness. In the world of human beings, 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 irritated, and in a dark environment, people will feel depressed. Our decorators and packaging printers use the printed decor colors to give consumers the products they need, decorating colorful and colorful ink colors, constantly adjusting people's work and living environment, and also giving people Benign stimulation is conducive to the promotion of work and quality of life.
In daily life, as long as we focus on the theme of adjusting the work and living environment space, we will often decorate and store several colors or store shallow, medium and deep levels for the goods in the same environment. Therefore, the use of color coordination and gradual thickening is always the central topic of our research. For example, complementary (red and green) colors (the two colors add up to white), sometimes not good will give people a cheesy or even dirty feeling. The deployment is good, it will give people a strong feeling and eye-catching and even pay attention to cleanliness and hygiene. Another example is light yellow with reddish brown, often because of the close color between yellow and red, the similar color tone can give people a harmonious beauty. (China Golden Packet Network is a professional metal printing and packaging industry portal) There is also a combination of dark green and light green, the color is fresh and not dazzling. In recent years, people have adopted a method of matching color and color at the same time, giving people a bright feeling and protecting their vision. When the three colors of red, white and blue are the same, they appear on a package. The feelings are: red is warm, white is pure, blue is solemn, reflecting the beauty of a commodity.
The colors and varieties of printing inks used in the 1980s were cheap and quality in the printing inks of the 1990s, while the packaging and printing inks of the 21st century were safe and healthy.