Basic knowledge of ink color

Basic knowledge of ink color

1. The relationship between color and light.

The physical basis of color and light is light, and color must exist in the presence of light. If there is no light, there will be no color, and there will be darkness, so there is light and there is color.

2, the three primary colors of light.
In daily life, the natural colors we can see are red, orange, yellow, green, cyan, blue, and purple. In the entire visible light, we are most sensitive to red, green, and blue. The color light only occupies a very narrow position between the three colors of red, green and blue. In fact, it is also obtained by mixing the three colors of red, green and blue, while the three colors of red, green and blue cannot be obtained by other colors. mixed to get. So we call red, green, and blue the three primary colors of light.

3. Mixing of shades.

1. Concept: The mixing of color light is additive color method (the comprehensive effect produced by the mixing of two or more color lights is called additive color method)

2. Mixing rule: The primary color light is added in equal amounts.

red light + green light = yellow light

Green light + blue light = cyan light

blue light + red light = magenta light

The three primary colors of light and the additive color method of color light

If two colors of light are mixed in a certain proportion to become achromatic, the two colors of light are complementary colors to each other.

blue + yellow = white light

green + magenta = white light

red+cyan=white light

That is, the complementary colors of red, green, and blue light are yellow, magenta, and cyan.

The three primary colors of light and the additive color method of color light

4, the mixing of pigments.
The mixing of colorants is a subtractive color method, which reflects the phenomenon of subtracting some color light from white light to obtain a certain color. When the pigment displays a certain color, it means that the color material has achieved selectivity for some color light in the white light spectrum. micronized amide wax kolkata Absorption, the result of subtracting some white light, such as: yellow, is to absorb blue and purple, and reflect red and green light, red light + green light = yellow light, that is, yellow.

Subtractive substances are divided into reflectors and transmittances. People who can observe colors from the front of colored objects are called reflectors, and those who observe colors from behind are called transmittances.

5. The three primary colors of pigments.
According to the mixing rule of the colorant, each primary color of the colorant should reflect the color light in two spectral regions, and it can be obtained by the mixing rule of the three primary colors of light: red, green, blue and light, magenta, yellow, and cyan. The three primary colors of pigments, it is the basis for mixing other colors, they are consistent with the complementary colors of the three primary colors of light.