Pigment is a kind of fine particle powder color, generally do not dissolve in water, oil, solvent and resin and other media, can be dispersed in various media. It has the covering power, tinting strength, light is relatively stable, commonly used in the preparation of paints, inks, and coloring plastics and rubber, so they can be called as colorant.
Pigment dye is different from general dye is soluble in water (the old distinction), and pigments generally insoluble in water. The dye is mainly used for dyeing textile materials. But this distinction is not very clear, since some dyes can not dissolve in water, and is also used for pigment printing paint and dope dyeing textiles. The chemical structure of organic pigments with organic dyes are similar, so often as a branch of dyes.
Pigment (Pigment) to powdery substance coloring. Do not dissolve in water, oil, resin, organic solvent media, but can be uniformly dispersed in the medium and the medium color, and has a certain covering power. Art pigments for the basic requirements of particles, the more detailed the better, the better the more bright colors, more durable not color the better (stability.). Watercolor watercolor pigment besides white, almost transparent. So as to meet the needs of watercolor cover dyed. Gouache is initially add powder white in watercolor paint, the color is opaque and the invention. Because of watercolor is transparent, so as to draw the wrong hard to modify. And gouache due to opacity can be easily modified. Later in gouache and add Arabia rubber and other raw materials for further improving its performance. Arabia glue can let the gouache paint dry surface with a layer of shiny, but in need of special occasions Tu (like the rendering and animation. This situation), glue will form irregular spots in the surface of colour, or let the uneven color, so there are special degumming pigment.
Oil is oil diluted pigment. Traditional Chinese painting is very rich, there are various types, from the powder to the plant extract to animal extract, complex type. In theory, as long as there is red yellow blue can recall all of the other colors, but out of tune the color purity is not high enough, so the art paint manufacturers modern for various color and brightness of the color, the production of high purity pigments to meet a variety of needs. From the most basic 12 color to the usual 24 or 48 color to sixty color color. Does not include the metallic color special.1 color. Color pigment is a kind of absorption of visible light selective and scattering of the pigment, can appear yellow, red, blue, green under natural light and color.2 color. The ability of pigments absorb light. The relative percentage can be equivalent to the standard color sample color representation.3 covering power. In the film material covers the bottom surface color ability. Commonly used pigments contained paint covering the area of 1 square meters of G number representation.4 light. The pigment properties retain their original colors in a certain light. Generally use the eight level, eight level best.5 weathering. Pigment in certain natural or artificial climate conditions, the ability to maintain its original properties. Generally use the five level, five level best.6 volatiles. Mainly refers to the water, the general provisions of not more than 1%.7 oil absorption. A refined linseed required 100 grams pigment formation of uniform mass when the kernel oil grams, with small amount of oil is good, oil absorption and pigment particles specific surface area and structure.8 water soluble substances. Pigment containing water-soluble substances, in mass% pigment. Paint with paint, often below 1% of its water soluble substances.
Pigment composition from chemical, can be divided into inorganic and organic pigments two kinds big, its origin can be divided into natural pigments and synthetic pigment. Natural pigment in mineral sources, such as: cinnabar, realgar, malachite green and red clay, calcium carbonate, silica, barite, talcum powder, mica powder, kaolin and so on. The biological origin, Buddha from animal: carmine, natural fish powder; from plants: Garcinia, alizarin red, indigo. The synthesis of pigment by artificial synthesis, such as titanium dioxide, lithopone, lead chrome yellow, iron blue inorganic pigment, as well as the big red, occasionally yellowish, phthalocyanine blue, quinacridone organic pigment. The classification by pigment function such as antirust pigment, magnetic pigment, luminous pigment, pearlescent pigment, conductive paint. With the color classification, is convenient and use method. So the pigment can be divided into white, yellow, red, blue, green, brown, purple, black, regardless of its source or chemical composition. Pigment according to the category classification of compounds: inorganic pigments can be subdivided into oxide, chromate, sulfate, silicate, borate, phosphate, molybdate, vanadate, iron thiocyanate, hydroxide, sulfide, metal; organic pigments can be divided into azo pigment, phthalocyanine, anthraquinone, indigo, quinacridone, two oxazine and polycyclic pigment, aryl methane pigments etc. according to the chemical structure of the compound. From the manufacturing point of view to classification can be divided into titanium pigment, iron, chromium, lead, and zinc pigments pigments pigments, pigments, synthetic organic pigments, has the practical significance of this classification method, often a system will represent a pigment professional production industry. From the application point of view to classification can be divided into paint with paint, ink, plastic paint, rubber paint with paint, ceramics and enamel paint, medicine cosmetics pigment, pigment and so on art. All kinds of special pigments have some unique properties, in order to meet the application requirements. Pigment production plant can be targeted for professional users pigment products series.