The physical properties of organic pigments

- Mar 08, 2019 -

Organic pigments refer to pigments made of organic compounds that have the characteristics of color and a series of other pigments.

The characteristics of pigments include resistance to sunlight, water, acid, alkali, organic solvents, heat, crystal stability, dispersion and hiding power.

The difference between organic pigment and dye is that it has no affinity with the object being colored. Only organic pigment is attached to the surface of the object by adhesive or film-forming material, or mixed in the object to make the object colored.


Organic pigments refer to pigments made of organic compounds that have the characteristics of color and a series of other pigments.

The characteristics of pigments include resistance to sunlight, water, acid, alkali, organic solvents, heat, crystal stability, dispersion and hiding power.

The difference between organic pigment and dye is that it has no affinity with the object being colored. Only organic pigment is attached to the surface of the object by adhesive or film-forming material, or mixed in the object to make the object colored.

The production of intermediates, production equipment and the synthesis process are similar to the production of dyes, so organic pigments are often produced in the dye industry.

Compared with general inorganic pigments, organic pigments usually have higher coloring power, particles are easy to grind and disperse, not easy to precipitate, colors are also more bright, but the sun resistance, heat resistance, weather resistance can be poor.

Organic pigments are widely used for coloring inks, coatings, rubber products, plastic products, stationery and building materials.


The variety of organic pigment colors is endless and colorful, but there is a certain inner connection between various colors. Each color can be determined by three parameters, namely, hue, lightness and saturation.

Tonal it is the characteristic that color differs each other, the chromatogram that decides to be made up with illuminant and each wavelength that place of object surface radiates produces feeling to the eye, can distinguish the characteristic such as red, yellow, green, blue, violet.

Brightness, also known as brightness, is the characteristic value that represents the change of brightness of the object surface;

By comparing the brightness of various colors, the colors can be divided into brightness and dark.

Saturation, also known as chromaticity, is the characteristic value of the surface color of an object, making the color bright and dark.

Hue, lightness, and saturation form a solid, and with these three building scales, we can use Numbers to measure color.

The color of nature is protean, but exceed basic it is red, yellow, blue 3 kinds, call primary color.

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