A treasure trove of knowledge of organic pigments

Organic pigment workers focus on post-treatment improvement of pigments, such as the selection of better crystal, the manufacture of finer and granular distribution and narrow particles, improve the moisture of pigments, so that organic pigments can play a greater role.

Organic pigments are those that have color and a range of other pigment properties and are made of organic compounds. Pigment properties include sun, water immersion, acid resistance, alkali resistance, organic solvent resistance, heat resistance, crystal stability, dispersion and cover. The difference between organic pigments and dyes is that they do not have affinity with the colored object, only adhesives or filmed substances attached to the surface of the object, or mixed within the object, so that the object is colored. The intermediates, production equipment and synthesis processes required for its production are much the same as the production of dyes, so organic pigments are often organized in the dye industry. Organic pigments and general inorganic pigments, usually have a higher coloring force, particles easy to grind and disperse, not easy to precipitate, color is more bright, but sun, heat, weather resistance is poor. Organic pigments are commonly used in the coloring of inks, coatings, rubber products, plastic products, cultural and educational supplies and building materials.

Organic pigments are classified by structure

(1) Azopigment stakes 59%

(2) 24% of the pigment

(3) Sanfang methane pigment stakes 8 %

(4) Special pigments accountford for 6 %

(5) Multi-ring pigments accounted for 3 %

Physical properties of organic pigments

Organic pigments are brightly colored, strong in color, low density and non-toxic, but some varieties are less light-resistant, heat-resistant, solvent-resistant and transport-resistant than inorganic pigments.

The variety of colors varies endlessly and colorfully, but there is a certain intrinsic connection between the various colors, each color can be determined by 3 parameters, namely tonal, bright and saturated. Hue is a characteristic of color difference between each other, determined by the light source's chromatographic composition and the surface of the object emitted by the wavelength of the human eye, can distinguish between red, yellow, green, blue, purple and other characteristics. Luminance, also known as brightness, is a characteristic value that represents a change in the degree of light and darkness on an object's surface; Saturation, also known as color, is a characteristic value that represents the color of the surface of an object, making the color bright and obscure. Tonal, luminal, and saturated form a three-dimensional, with these three to establish the scale, we can use numbers to measure color. Nature's colors are ever-changing, but the most basic are red, yellow and blue, called primary colors.