What is the difference between organic pigments and dyes? What is the difference between organic pig

The traditional use of dyes is to dye textiles, while the traditional use of pigments is to color non-textiles, because dyes have an affinity for textiles and can be adsorbed by fiber molecules and fixed. However, all the coloring objects in the pigment pile have no affinity, and mainly rely on other film-forming substances such as resin and adhesive to bind with the coloring objects. Dye is generally dissolved in the medium used in the process of use, even if it is a disperse dye or a vat dye, it is also a process from the crystal state to the water dissolved in the molecular state and then dyed on the fiber.

Therefore, the color of the fuel itself does not represent its color on the fabric The pigment always exists in its original crystal state because it is insoluble in the medium used during use, so the color of the pigment itself represents its color on the substrate. Now the production of pigments in the world has been increasing, and the domestic production of organic pigments has begun to increase.

1. The composition is different.

Organic pigments: azo pigments accounted for 59%, phthalocyanine pigments accounted for 24%, triaryl methane pigments accounted for 8%, special pigments accounted for 6%, polycyclic pigments accounted for 3%.

Inorganic pigments: Inorganic pigments include various metal oxides, chromates, carbonates, sulfates and sulfides, such as aluminum powder, copper powder, carbon black, zinc white and titanium dioxide, etc., all belong to the category of inorganic pigments.

2. The characteristics are different.

Organic pigments: organic pigments have bright colors and strong tinting strength; It is non-toxic, but some varieties are often inferior to inorganic pigments in terms of lightfastness, heat resistance, solvent resistance and migration resistance.

Inorganic pigments: inorganic pigments are light-resistant, heat-resistant, weather-resistant, solvent-resistant, and have strong hiding power, but the chromatography is not very complete, the tinting strength is low, the color brightness is poor, and some metal salts and oxides are highly toxic.

Organic pigments in general.

The color is bright, the color concentration is high, the color of inorganic pigments is relatively dark, the organic pigments are much higher than the inorganic pigments, and the light fastness of organic pigments is not as good as that of inorganic pigments, so it is generally used for outdoor paints, coatings, etc., mainly inorganic pigments, and organic pigments are mainly used for low light fastness.

Pigments are soluble and insoluble, inorganic and organic. Inorganic pigments are generally mineral substances, and humans have known to use inorganic pigments for a long time, using colored earth and ores to paint and smear the body on rock walls. Inorganic pigments include cadmium, cadmium, iron oxide, as well as newly emerging environmentally friendly color inorganic composite pigments, such as Kohler pigments.

Organic pigments are generally derived from plants and marine animals such as madder indigo, garcinia cambogia and purple from shellfish in ancient Rome. Organic pigments have bright colors and strong tinting strength; Low density and non-toxic. Organic pigments appear to be loose, while inorganic pigments are heavier.

Organic pigments generally have higher brightness and higher coloring strength than inorganic pigments.

Good evening, there is no essential difference, they all belong to the insoluble fine particles (lakes). However, in terms of color richness, organic pigments can be synthesized freely, and its color types are more than inorganic pigments, and the colors are richer and fuller. Most of the oil paints, acrylic paints and water-based pigments used in inkjet printers are organic pigments, please refer to it.

Differentiation: According to the principle of same-sex compatibility, it can be distinguished by a high concentration of alcohol. Here's how:

Method: Take a small amount of pigment and put it in alcohol, stir, and observe the amount of precipitation. If there is a dissolution phenomenon, it is an organic pigment.

Commonly used organic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green, lightfast red, macromolecular red, macromolecular yellow, permanent yellow, permanent purple, azo red, etc.

Commonly used inorganic pigments are the royal number: cadmium red, cadmium yellow, titanium dioxide, carbon black, iron oxide red, iron oxide yellow, etc.

Method: Take a small amount of pigment and put it in alcohol, stir, and observe the amount of precipitation. If there is a dissolution phenomenon, it is an organic pigment. The first year of the year.

The pigment dye differences are as follows:

The difference between pigments and dyes is mainly due to the difference in application performance. If the dye main car cavity is to dye textiles, pigments are mainly used to color non-textiles.

This is because dyes have an affinity (directness) for textiles and can be adsorbed and fixed by fiber molecules; Pigments, on the other hand, have no affinity for all colored objects, and are mainly bound to the colored objects by resins and adhesives. Dyes emphasize transparency and generally have good brightness; Pigments emphasize coverage and are generally stable.

Difference 1: Solubility is different. One of the most fundamental differences between pigments and dyes is their solubility, as we all know, pigments are insoluble in liquids, while dyes are soluble in liquids, such as water, oil, etc.

Difference 2: The coloring method is different. The second difference between pigments and dyes is the different methods of coloring.

Pigment is a powdered colored substance, when coloring, it should be poured into the liquid first, although it will not decompose and dissolve in the liquid, but it will be evenly dispersed, stir evenly, and begin to color with a brush.

The coloring method of the dye is to pour it into the liquid, and when it is completely dissolved in the liquid, then put the brush into the liquid, dye it, and then take out the brush and then you can directly brush and color.

Difference 3: Different uses. After looking at the above two differences, let's take a look at the last difference, which is the use. Pigments are mainly used in coatings, inks and printing and dyeing; Dyes are mostly used in fibrous substances, chemicals or building decoration.