The law of color change when pigments are mixed mainly follows the principle of subtractive color mixing. Subtractive color mixing refers to the mixing of pigments or object colors, which is characterized by the fact that the more color components are mixed, the lower the brightness of the color. This is because when pigments are mixed, each pigment absorbs part of the light waves, causing the mixed color to become darker.
Specifically, when two or more pigments are mixed, the light waves absorbed by each of them are superimposed, thereby reducing the brightness of the reflected light. For example, when red and blue pigments are mixed, the mixed color will be darker than using either pigment alone. This is because red pigments absorb all light waves except red, while blue pigments absorb all light waves except blue. After the two are mixed, the range of absorbed light waves is wider, so fewer light waves are reflected, and the color is darker.
In addition, color shift occurs when pigments are mixed. This is because the pigment particles of different pigments have different sizes and distributions, which may cause the mixed color to be biased towards a certain color. For example, when yellow and blue pigments are mixed, the mixed color may be biased towards green or gray, depending on the proportion of the two pigments and the mixing method.
In general, the law of color change when pigments are mixed is complex and is affected by many factors, including the type, proportion, and mixing method of the pigments. Understanding these laws is very important for fields such as artistic creation and industrial design.