Paint paint coloring techniques (1) Care should be taken when coloring. Generally, try the sample first, and initially determine the quantity of the color matching paint, and then prepare the large sample according to the sample result. First adjust the secondary and secondary colors separately in the small container.


(2) First add the main color (the color is used in the color matching, the coloring power is small), and then the dark color (or color matching) with large dyeing power is slowly and intermittently added, and the stirring is continued, and the color change is observed at any time.


(3) “From shallow to deep”, especially when adding pigments with strong tinting strength, avoid excessive.


(4) In the color matching, there may be slight differences in the color of the coating film after drying and drying. The color of various paints is generally shallow when wet film, and the color is deepened when the paint is dried. Therefore, if the sample is a dry sample, the color matching paint needs to be dried and then compared for color measurement; if the sample is a wet sample, the sample can be dropped into the color matching paint to observe whether the two colors are the same.


(5) It is necessary to know in advance the degree of floating of the primary color in the multi-color paint and the change of the paint, especially the amino paint and the perchloroethylene paint, which need more attention.


(6) When blending multi-color coatings, the coatings with the same properties should be selected and the solvent system should be mutually soluble. Otherwise, the miscibility of the coatings is not good, which will affect the quality, and even delamination, precipitation or gelation may occur. .


(7) Because the color often has a variety of different color heads, if the green color is matched, the yellow with green head and the blue with yellow head are generally used; when it is purple, the blue with red head and blue head with blue head should be used. Red; when used with orange, red with yellow head and yellow with red head should be used.


(8) Pay attention to the auxiliary materials, such as drier, curing agent, thinner, etc., in the process of blending colors, so as not to affect the color.


(9) When blending gray, green and other complex paints, due to the preparation of various pigments, the density and oil absorption of the pigments are different, it is likely that "floating color" and "floating" may occur, and at this time, a small amount may be added as appropriate. Surfactant or leveling agent, anti-floating agent to solve. As usual, 0.1% of silicone oil is added to prevent and control. The various surfactants produced by foreign companies need to distinguish which solvent system is used, and the amount of addition is generally 0.1% to 1%.


(10) The color paint film is slightly transparent, and the suitable base color can make the color of the top paint more vivid than the original paint. This is based on the principle of natural light reflection absorption, and the background color is superimposed with the original color. One color, the paint project is called "transparent color."



1, the color of the achromatic object
An achromatic object refers to a black, white, gray object that has a non-selective absorption characteristic of illumination light, that is, when the light is irradiated onto the achromatic object, the color light of various wavelengths in the absorbed incident light is equal; The reflected or transmitted light has the same spectral composition as the incident light. When white light is irradiated onto the achromatic object, the reflectance is above 75%, that is, it is white; when the reflectance is below 10%, it is black; when the reflectance is between the two, it is gray with different shades.

2, the color of colored objects
The colored object has the characteristic of selectively absorbing the illumination light, that is, when the light is irradiated onto the colored object, the colored light of various wavelengths absorbed in the incident light is unequal, and some are absorbed more, and some are less absorbed. When white light is irradiated onto a colored object, the reflected or transmitted light is not only reduced in brightness but also in spectral composition, and thus exhibits various colors.





3. The influence of the spectral composition of the light source on the color of the object
When colored light is irradiated onto the achromatic object, the color of the reflected light of the object is the same as the color of the incident light. When two or more colored lights are simultaneously irradiated onto the achromatic object, the color of the object is additive. If red and green light illuminate a white object at the same time, the object is yellow.
When colored light is irradiated onto a colored object, the color of the object exhibits a subtractive effect. In contrast, a yellow object appears red under magenta light, green under cyan light, and gray or black under blue light.



4, the relationship between the color of the object and light
• non-self-luminous colour
The color produced by the object through illumination is the color of the non-illumination color, such as color ticket, paint, fabric, and the like.
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