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Several methods of paint coloring

Several methods of paint coloring

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  • Time of issue:2019-09-20 13:19

Several methods of paint coloring

Colors are divided into achromatic and color, and achromatic refers to black, white, and shades of gray between the two. The achromatic reflectivity on the white and black series represents the brightness of the object. When the reflectance is higher, it is close to white, and the lower it is, it is close to black. The color series refers to various colors other than the white and black series. Different wavelengths of the spectrum visually appear as tones of various colors, such as red, orange, yellow, green, cyan, purple, and the like. To be precise about a particular color, one must consider the three basic properties of color, namely hue, saturation, and lightness, which together form a unified total effect in vision. Hue refers to which wavelength is dominant in the light reflected by the object. Different wavelengths produce different color sensations, and hue is the basic feature that determines the essence of color. The saturation of a color refers to the vividness of a color. Hue, lightness, and saturation are the three basic properties of color, while achromatic colors have only the difference in brightness, and there are no attributes such as hue and saturation.

The mixed color of the paint is three colors, yellow, blue and purple.

The mixed color of the paint follows a subtractive color principle. Its three primary colors are yellow, cyan, and purple, and their complementary colors are blue, red, and green. The so-called complementary color, that is, two kinds of color light are mixed in a certain proportion to obtain white color light, the red complementary color is cyan, the yellow complementary color is blue, and the green complementary color is purple. The results of subtractive color mixing are summarized as follows:

Yellow = white - blue

Purple = white - green

Cyan = white - red

Yellow + purple = white - blue - green = red

Yellow + cyan = white - blue - red = green

Purple + Cyan = White - Green - Red = Blue

Yellow + purple + cyan = white - blue - green - red = black

These relationships indicate that the pigments are added together, and the color obtained after mixing is reduced in brightness.

The paint coloring technology mainly includes solid color paint coloring, clear paint coloring, etc., usually before the color formula is formulated, according to the color template or the color of a certain object, first understand the hue range, by several colors Composition, which is the main color, which is the secondary color, the relationship between the color and the color, how much is the proportion of each, and then based on the experience to initially formulate the coloring formula, and then through the small sample debugging, coloring, first join The main color, then the color with strong tinting strength as the vice, slowly and intermittently added and constantly stirred, you should observe the color change at any time, sample, wipe, spray or dipped on a clean sample plate, after the color is stable and original For the colorimetric sample, the principle of “from shallow to deep” must be mastered throughout the toning process. It can be seen from the principle of subtractive color method that if the sample is compared with the standard sample, the reddish color can be reduced or the green color can be used. If the green color is too green, the green color or the purple color can be used, and the blue color can be adjusted by the method of reducing the blue or the yellow color. And vice versa, because yellow, cyan, purple and blue, red and green complement each other, but this mixing of pigments will result in a decrease in brightness, and black and white can be used to adjust the brightness of the mixed colors.

Refining method for concentrating color paste using varnish in dark field

At present, paint manufacturers generally have black, white, red, green, blue, yellow, cyan, purple and other color pastes for coloring. When performing solid color paint, more light gamut is used in white base paint. A high-concentration color paste of less than 5% is used for coloring, and a dark color field is used to reinforced the coloring method of the quantitative colorant. The transparent color is selected from some transparent pigment paste or dye liquid. The color change of the transparent color is also affected by the thickness of the coating and the substrate. In the actual color matching, the thickness and substrate should be specified. Compare on. Understand the basic knowledge of the color of these paints, study hard and practice at work, will quickly master this technology.

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