Color mixing: There are addition color mixing and subtraction color mixing.

Additive color mixing: Is at the same point in the retina of the human eye at the same time (or rapidly alternate) into two or more beams of light color, resulting in the color of another color different from the color of these light feeling, it is the color of the color of the superimposed color mixing method < The mixture of two beams of light projected together is additive mixing, The result of their mixing is an increase in the brightness of the mixed light (equal to the sum of the brightness of the two lights before mixing)>. The hue of the mixed light depends on the hue of each light involved in the mixing and their relative strength. For example, red and green light can be mixed to produce yellow or orange light. If two beams of light are mixed in the right proportion to produce white light, such as red light and blue-green light, then the colors of the two beams of light are called complementary colors. The three primary colors mixed by addition are red, green, and blue. The various colors on the TV screen are obtained by the addition of the three primary colors of red, green and blue.

Subtraction color mixing: two or more colored objects are superimposed together to produce different colors of each object, and the dyes we use usually have such characteristics: they can selectively absorb some bands (or certain colors) of light in the visible spectrum. Therefore, the color of the dye is shown by the remaining color light after it absorbs a part of the color light in the light source, for example, the yellow dye shows yellow because it absorbs the short-wavelength light such as green and blue. It is because of this light absorption of the dye, so the brightness of the mixed color shown by mixing the two dyes together will be smaller than before mixing, so it is subtraction mixing. In addition, the color produced by printed matter is also produced by subtractive mixing of various colors of ink. The three primary colors mixed by subtraction are cyan blue, magenta and yellow, which are the complementary colors of the three primary colors mixed by addition (red, green and blue) respectively.

The average mixing of colors: The average mixing of colors can be illustrated by the example of a gyroscope: first paste several colors on the surface of the gyroscope, yellow and blue, and then rotate the gyroscope quickly, then the color we see will be green, which is an effect (or illusion) produced by the frequent action of yellow and blue colors on the retina in the visual reaction time of the human eye. The result of this mixing only makes the hue change, and the total brightness does not change, so it is an average mixing.

Description: The three ways of color mixing in different occasions have their own uses, master their rules of action, we can make the world become colorful, colorful.

Additive color mixing three primary colors: red, green, blue, subtraction color mixing three primary colors: magenta, yellow, blue

The three primary colors are independent of each other, and none of them can be matched by the other two.

The three primary colors of addition and subtraction are complementary colors, namely: red and blue, green and magenta, yellow and blue, complementary colors. In the printing and dyeing industry, color mixing is the use of several dyes, which belongs to subtraction color mixing.

Color matching

Dye matching color three primary colors: red, yellow, blue. (The red, yellow and blue here refer to the primary colors of the subtraction mixture of magenta, yellow and blue, respectively). Orange, green and purple can be obtained by combining two different primary colors, which are called secondary colors. A combination of two different secondary colors, or a combination of any primary color and black or gray to create a tertiary color.

he following points should be noted when matching colors:

First, the nature of the fiber: because of the different structure of the fiber, the nature is different, so it is necessary to choose dyes that are suitable for the nature of the fiber. Such as dyeing cotton with activity, dyeing polyester with dispersion. The same type of dye should be used as far as possible when matching colors, which is conducive to the simplification and operation of the dyeing process. The dyeing properties of dyes should be similar. Such as: directness, dyeing rate, diffusivity, dyeing fastness, etc., otherwise the color light after dyeing is different, and the degree of fading during use is different.

The number of dyes used in color matching should be as small as possible in order to control the color light, and it is best not to exceed three dyes when color matching. If the dye itself has been mixed by several dyes, when the dye is used as the main color, the dye after the color is selected as much as possible to reduce the number of dyes.

1. Consider the fastness of the dye. Including: sun, washing, wet friction, perspiration, water fastness.

2. To consider the production situation of the workshop, the selected dye should be convenient for workshop production.

3. Consider the cost. In the case of meeting customer quality requirements, choose the lowest cost dye.

4. Consider the same light and different spectrum. Mostly demanding clients.

5. To master the residual color principle. Residual color that two colors have the characteristics of mutual reduction, such as violet blue, that violet light is too weak, you can add some residual color (yellow dye) to reduce, it is worth noting that: residual color theory is only adapted to adjust the color light is only a small amount of adjustment, otherwise too much will affect the color depth and brightness.

Two, color

Method of color matching:

1. Select the corresponding light source;

2. The template must be kept opaque to light;

3. The template and standard board are placed in the center of the light box;

4. Place the standard plate on the right side of the template;

5. Place the template and standard board perpendicular to the viewer parallel;

6. When the color is compared, the template and the visual direction are 45°.

Three, color

The key to color

First of all, what is the primary color and secondary color? We call the dye that determines the depth of the color the main color, and the dye that can adjust the color light and brightness of the color the secondary color. The main color and the secondary color mix color, then get a variety of required colors. The main color and the secondary color are only relative, that is, the main color can not be completely single, and the secondary color is not completely two simultaneously. For example, the main color and the secondary color should be well matched to get the ideal result. A certain color, the dye is determined, and the relationship between the main color and the secondary color exists. Moreover, only the most appropriate proportions can get the best colors.

When mixing colors, how to adjust the primary and secondary colors to get better results faster? It is best to divide into two cases, one is the secondary color and the main color proportion is larger (greater than 10%), that is, the color is relatively dark, this situation is relatively simple, according to the addition, subtraction, multiplication and division of each single dye can be calculated. The other situation is that the secondary color and the main color are smaller (less than or equal to 10%), that is, the more colorful situation, and the adjustment formula is best adjusted according to the proportion of the secondary color and the main color. Especially if the proportion is less than 1%, the color mixing courage is larger, which is less than the current amount, and you can wave away without looking back. If you want to increase, you must make great strides, develop exponentially, and do not feel heartache.

In the actual process of color mixing, attention should be paid to the influence of the change of dye concentration on the change of dyeing depth and the influence of dyeing saturation on color mixing.

For light, dark and medium dark colors, if you need to increase the same medium color depth, the color range is light, the dark color is greater than the medium dark color, when the dye concentration reaches the dyeing saturation concentration, then increasing the dye concentration has little effect on the color change, but because the concentration of the dye is too large, it will cause the concentration of the dye and lead to a decrease in the amount of obtained.