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Pigments Belong To Colored Organic Matter

Nov 02, 2017

Pigments are mixtures of pigments and carrying agents, and the sticky, slimy things that you can dip into your hands.

A color profile describes three properties of any pigment color: hue (name corresponds to the spectral color-red, orange, yellow, green, cyan, blue, purple, magenta), brightness or luminance value (from dark to bright) and chroma or saturation (from dull to strong). The color appearance of the pigment is affected by its dilution degree. The pigment that is extruded directly from the pipe is called the primary color (masstone) or the head tone (top tone). After a large amount of water or white pigment diluted, Pigment the color presented is called the background (undertone) or tone (tint tone).

Photometric (lightfastness). Pigments that can withstand prolonged illumination are called light-resistant. "Bold" you want to avoid any pigments that are not completely resistant to light. "Bold" that is, in the photometric test to obtain the following 6 points of pigment.

Pigment load (pigment load) or pigment concentration (pigment concentration). Pigment This is the proportion of pure pigments contained in a tube of paint. The more pigments, the more rich and gaudy pigment main color, the better the coloring power, with a tube of paint you draw more.

Coloring Force (tinting strength). The strength of a small amount of paint that is diluted with a large amount of water or white on paper;

Transparency (transparency). Traditional watercolor painters have a non-standard definition of "transparency": pigments can cover black/white patterns with higher cloaking or opacity. Low coverage (as watercolor painters call it transparent) there is greater freedom to layer colors. In fact, Pigment transparency means that when a black surface is painted, the pigments appear colorless.

Staining (staining). Pigments that are difficult to lift or wash away from paper are called staining, although this pigment property is often dependent on the absorption of the paper (fixed length, fiber length and pulp density).

Sticky consistency (viscosity). The viscosity of commercial watercolor pigments is from a clay to a honey-like shape; the current trend for manufacturers is to move toward more liquid (low viscosity) pigments.

Particle size (particle size). The average size of individual pigment particles may be as large as sand grains, and may be visible only under high-power microscopes. Pigment Although you can only identify the largest particles with the unaided eye, the size affects many other properties--color appearance, light resistance, tinting power, transparency, staining, viscosity and sediment texture.

Diffusion (dispersability). This is the ability of pigments to dissolve quickly and evenly in the water. Pigments that take a long time to dissolve or dissolve into clumps have low diffusivity and are usually filled with a high proportion of adhesive adhesives.

At present, the pigment is basically solid, in order to let the pigment soluble in water, become the pigment we use, but also need another important thing: the carrying agent. Each manufacturer's load-carrying agent is their secret ingredient, Pigment and the use of pigments is largely determined by this load-bearing agent. Basic composition of pigments: pigments + carrying agents = pigments, the basic properties of all pigments are: pigments determine the formulation of the carrier formula (vehicle), and the carrier determines the use of pigments (handling attributes). For example, a normal palette of ultramarine and cobalt blue is usually used in the fastest, especially wet drawing, Pigment and feels always to dip, which is because in the production process in order to accelerate the mixing of pigments and carriers, a SOAP diffusion agent was added to the pigment. Soap is very easy to melt in water, Pigment it speeds up the consumption of pigments.

Pigments are organic substances of a coloured nature, defined as organic substances that are colored with a highly dispersed particle state. It forms all coloured compounds together with inorganic coloured matter. The organic coloured substance can be colored by coloring materials or other substances in various ways. According to its molecular structure and dissolution characteristics can be divided into organic dyes and inorganic pigments, Pigment the two have different application characteristics. The former is soluble and mainly used in textile dyeing. However, because the chemical structure of pigments is similar to organic dyes, it is usually regarded as a branch of dye.

Although pigment and organic dye belong to a kind of colored compound with close relation, their application can have their particularity because of different object, field and coloring form. Pigments must have a bright color, high coloring strength or coloring force, good light resistance, weather fastness, heat resistance, solvent resistance, mobility and easy to disperse performance. So although many VAT dyes are used as dyes, with excellent light fastness and heat resistance, but in the insoluble powder state application, its brightness is poor, shading intensity is low, make most varieties do not have the performance as pigment, only a few varieties such as reducing blue RSN, reducing Yan gr, Pigment reducing yellow g, After a specific pigment treatment, it was changed to pigment variety C. I. Pigment Blue 60, pigment orange 43, pigment yellow 24, as a high-grade paint coloring.

In addition, both pigments and inorganic pigments are insoluble coloured substances, but due to the different molecular structure, the application performance is obviously different. Many kinds of inorganic pigments, low cost, simple production process, and excellent durability and thermal stability, Pigment suitable for building paint, glass, ceramics, enamel, rubber and some plastics coloring. In contrast, pigments not only varieties, but also a wide spectrum, with bright colors, bright tones, through deep processing to prepare for different application needs of special commodity formulations, while the development of new chemical structure of high-grade pigments, with excellent durability, heat resistance, solvent and other application performance, in line with high-grade paint, Plastic and high-grade printing ink requirements.