What are the types of colorants What are the types of industrial colorants

There are two main types of colorants: pigments and dyes. Pigments are colorants that cannot be dissolved in ordinary solvents, so in order to obtain the desired coloring properties, it is necessary to uniformly disperse the pigments in the plastic by mechanical methods. According to the structure, it can be divided into organic pigments and inorganic pigments.

Inorganic pigments have excellent thermal stability and light stability, low coloring strength, and relative density.

Big; Organic pigments have high tinting strength, bright color, complete chromatogram and small relative density, and the disadvantages are that they are inferior to inorganic pigments in terms of heat resistance, weather resistance and hiding power. Dye is an organic compound that can be used in most solvents and dyed plastics, with the advantages of low density, high tinting strength and good transparency, but its general molecular structure is small, and it is easy to migrate when colored.

White pigments mainly include titanium dioxide and zinc oxide.

There are three kinds of zinc barium white. Titanium dioxide is divided into two structures: rutile type and anatase type, and the refractive index of rutile type titanium dioxide.

High, high hiding power, stability, good weather resistance.

Carbon black. It is a commonly used black pigment, **cheap, and also has ultraviolet rays on plastics.

Protective (anti-aging) and conductive effect, different production processes can obtain a wide range of different carbon blacks, and the properties are also very different. Carbon black is divided into pigmented carbon black and rubber reinforcing carbon black according to its use, and pigmented carbon black is divided into high-pigment carbon black, medium-pigmented carbon black and low-pigment carbon black according to its coloring ability. Carbon black particles are prone to aggregation, so it is necessary to improve the tinting strength of carbon black and solve the dispersion of carbon black.

Pearlescent pigment, also known as mica titanium pearlescent pigment, is a kind of titanium dioxide.

Coated mica wafers. According to the different hues, it can be divided into three categories: silver-white pearlescent pigments, rainbow pearlescent pigments, and color pearlescent pigments.

Classified by **.

It can be divided into two main categories: natural colorants and synthetic colorants.

1. Natural colorants.

Natural colorants are carotenoids extracted or processed from animals, plants, and microorganisms. In China, natural animals and plants are often used as colorants, such as ginseng stem and leaf powder and marigolds.

Flour, purple refined powder, cassava.

Leaf meal, pine needle leaf powder, orange peel.

Powder, acacia leaf powder, carrots, shrimp and crab shell powder, seaweed, etc. are used as colorants for livestock, poultry and aquatic products.

2. Synthetic colorants.

Synthetic colorants are mainly carotenoids. Such as -apo-8-carotene aldehyde (C30H40O) or -A-pa-8-carotenoid ethyl ester (C32H44O) as well as citrynein (C33H44O), cantharidin, galihong, galihuang, and decontin.

Wait. Classified by solubility.

It can be divided into fat-soluble colorants and water-soluble colorants.

Classification by structure.

Synthetic colorants can be classified into azo, oxyanthracene and diphenylmethane;

Natural colorants can be divided into pyrroles.

Species, polyenes, ketones, quinones and polyphenols, etc.

The chemical synthetic pigments allowed to be used in China are: amaranth red, carmine.

Erythrosin, new red, tartrazine, sunset yellow, indigo, brilliant blue, and various pigments to enhance the dispersion of the above water-soluble acidic pigments in oils and fats.

The natural pigments allowed to be used in China are: beet red, shellac red, bilberry red, capsicum red, red rice red and other 45 kinds.

According to the classification of colorant form, it can be divided into 6 categories.

1. Dye or pigment powder. That is, the dye or pigment is ground into a fine powder and mixed directly with the plastic for coloring. This colorant has the lowest cost, but it has poor dispersion and is easy to contaminate when the powder flies. Poor automatic measurement and poor color matching repeatability.

2. Dispersible powder colorant. A dry powder made by surface treatment of pigments and then dispersants. It has good dispersion, but it still has the disadvantages of dust pollution and poor automatic metering.

3. Granular colorant. It is the granules of powder colorant, which avoids flying pollution and improves the automatic metering of Lao Zheng Lu, but the cost is increased compared with the previous two, and the particles are easy to break and pulverize.

4. Wettable colorant. A powder made by treating pigments with some polymer and dispersant and fully wetting them. This type of colorant has good dispersion and small scattering, but the cost is high.

5. Liquid colorant. Pigments are produced by dispersing pigments in high concentrations in organic liquid color carriers. According to different concentrations, there are paste, paste, paste and other forms, this kind of colorant has good dispersion, easy to use, soft PVC products coloring commonly used this kind of colorant.

6. Concentrated masterbatch. The pigment is dispersed in resin with a high concentration of tung and mixed into flakes or granules. This type of colorant has good dispersion, no scattering pollution, easy to use, but high cost.

Features and uses. In today's world, the application of plastic materials and their products has involved all walks of life, all aspects, and even every family, and more and more business people are involved in the production and sales of plastic products. What kind of colorants should be used for plastic products has also become a topic of discussion in the plastic industry.

1 Types of plastic colorants.

The types of plastic colorants are divided into four types according to their physical form: powdered colorants-toners; paste-colorant-colorant; liquid colorants; Solid colorants - masterbatches. Among them, powder colorants and solid colorants are widely used.

Therefore, the other two colorants are not discussed here.

2 Characteristics of various colorants.

The method of directly coloring plastic particles with toner (pigment or dye) and adding an appropriate amount of powdered additives is also known as dry coloring.

Its advantages are good dispersion, low cost, and small batch operation. Because it saves the consumption of manpower and material resources in the processing of other colorants, such as masterbatch and color paste, the cost is low, and the buyer and seller are not limited by the quantity.

It is impossible to make 1 2kg for the manufacture of masterbatch, but the toner can be arbitrarily specified according to the need, and the preparation is very convenient. Compared with other granulation and coloring, the processed resin undergoes a degradation process less, which is conducive to reducing the aging of plastic products and increasing their service life.

1. Colorant, also known as food coloring, is a substance that takes food coloring as the main purpose to give color to food and improve food color.

2. At present, there are more than 60 kinds of food colorants commonly used in the world, and there are 46 kinds of rock reputations allowed to be used in China, which are divided into two categories: food synthetic colorants and food natural colorants according to their ** and properties. With the improvement of people's awareness of the safety of food additives, vigorously developing natural, nutritious and multi-functional natural colorants has become the development direction of colorants.

Natural colorants include citrus yellow, caramel pigment, tomato red, safflower yellow, rose eggplant red, capsicum red, theaflavins and other varieties, which are pigments extracted from the phytophyll's attack, no toxicity and natural colorants can be divided into six kinds according to the chemical structure, and five kinds according to the structure, which are mainly used in the production of candy and desserts.

1. Introduction

There are more than 50 kinds of natural colorants allowed to be used in the world, and more than 40 kinds are allowed to be used in China, including citrus yellow, caramel pigment, capsicum red, turmeric, safflower yellow, tomato red, chlorophyll copper sodium salt, theaflavin, mulberry red, red kernel denier rice red, beet red, etc.

2. Classification

According to the chemical structure, natural colorants can be divided into six kinds, namely polyphenol derivatives, isoprene derivatives, tetrapyrrole derivatives, ketone derivatives, quinone derivatives, and other pigments, and can be divided into five kinds of pyrrole pigments, polyene pigments, ketoquinone pigments, and pyridine pigments according to the structure.

3. Application

Most of the natural colorants are non-toxic and can be used in the production of beverages, candies, pastries, dairy products, canned fish, etc., and natural colorants can also be added when processing vegetables, fruits and seasonings, which has the effect of adding color.

Natural colorants include citrus yellow, caramel pigment, tomato red, safflower yellow, rose eggplant red, capsicum red, lachong theaflavin, etc., which are pigments extracted from plants, no toxicity and natural colorants can be divided into six kinds according to the chemical structure, and five kinds according to the structure, which are mainly used in the production of candy and desserts.

What are the varieties of natural colorants.

1. IntroductionThere are more than 50 kinds of natural colorants allowed to be used in the world, and more than 40 kinds are allowed to be used in China, including citrus yellow, caramel pigment, capsicum red, turmeric, safflower yellow, tomato red, chlorophyll copper sodium salt, theaflavin, mulberry red, red rice red, beet red, etc.

2. ClassificationAccording to the chemical structure, Tianji Muran colorants can be divided into six kinds, namely polyphenol derivatives, isoprene derivatives, tetrapyrrole derivatives, ketone derivatives, quinone derivatives, and other pigments, which can be divided into five kinds of pyrrole pigments, polyene pigments, ketoquinone pigments, and pyridine pigments according to the structure.

3. ApplicationMost of the natural colorants are non-toxic and non-toxic, and can be used in the production of beverages, candies, pastries, dairy products, canned fish and cherry meat, etc., and natural colorants can also be added when processing vegetables, fruits and seasonings, which have the effect of adding color.

Colorants and fluorescents are two different chemicals, so colorants are not fluorescents. A colorant is a chemical substance that changes the color of an object's surface without changing its essential properties. Colorant pants are widely used in textiles, food, cosmetics, stationery and other industries, with the characteristics of beauty, light resistance, water resistance and so on.

For example, food colorants can be used to change the color of various food products to enhance the visual effect of food. Stationery colorants can add corresponding colors to various stationery supplies such as pens and notebooks to increase their characteristics.

Fluorescents, also known as luminescent dyes, are special chemicals that absorb light energy, convert it into a higher energy excited state, and then re-release it, resulting in fluorescence. Fluorescent agents have unique luminescence and fluorescence properties, so they are widely used in fluorescent displays, fluorescent lighting, biofluorescence analysis and other fields. Industrial applications of fluorescents contain colorants, but they are two different concepts.

It is important to note that although colorants and fluorescents may look different, they are sometimes used in similar applications, such as in the field of pigments and dyes, and sometimes colorants can also be used to prepare fluorescent dyes in order to control the color and intensity of fluorescent dyes. In addition, fluorescent dyes are often used as labels in chemistry and biology to track the whereabouts of substances in analysis. This suggests that the line between colorants and fluorescents is not so clear, and that the two are related in some cases.

Colorant is a chemical synthetic agent, also known as chemical dyeing agent, after eating through the digestive tract, liver and kidney metabolism will affect human health, occasional use can be metabolized and discharged, such as long-term or one-time consumption of a large number of foods containing sunset yellow and other colorants may cause allergies, diarrhea and other symptoms.

When the intake is too large and exceeds the load of human organs, it will accumulate in the human body, and the wheel can cause certain damage to the kidneys. There are 10 kinds of synthetic colorants allowed to be used in China. Reasonable use of colorants in accordance with the standard regulations will not cause harm to human health.

Whether it is a natural food colorant or a food synthetic colorant, its safety must stand on the same starting line for risk assessment.

As long as it has passed the risk assessment, obtained the approval and is used in accordance with the standard provisions and the corresponding quality specifications, it is safe and will not cause harm to the health of consumers. The food additives allowed in Paichang GB2760 have been evaluated for safety, and consumers do not need to worry about the colorants used in accordance with the standards.

Therefore, I would like to remind everyone here that for the sake of health, do not eat colorant foods and use plastic bags without safety signs.

Colorants and fluorescents are not exactly the same. They have different characteristics and applications.

A colorant is a chemical substance that is used to add color and dye. They can be used in a variety of products, including food, fabrics, cosmetics, paints, and more. Colorants render the desired color by absorbing specific wavelengths of light.

Fluorescent agents are a special type of chemical substance that has luminescent or fluorescent properties. They can absorb light of a certain wavelength and re-emit it at a longer wavelength, creating a fluorescence effect. Fluorescent agents are commonly used in applications such as fluorescent labeling, fluorescence microscopy, fluorescent inks, and fluorescent dyes.

While some fluorescents can also be used as colorants, not all of them produce a megafluorescent effect. The purpose of colorants is mainly to dye objects, while fluorescents are more focused on luminescent properties.

Therefore, although colorants and fluorescents can sometimes be mixed with each other, there are significant differences in their chemical properties, application fields and effects. <>

Colorants and fluorescents are two different chemicals.

There are some differences between colorants and fluorescents in their properties and uses:

1.Properties: A colorant mainly refers to a substance that can provide color to an object or solution, they can absorb some specific wavelengths of light and reflect other wavelengths of light.

Colorants achieve coloring effects by altering the absorption and reflection properties of light. Fluorescent light destroyers, on the other hand, are a class of substances that can absorb short-wavelength light (such as ultraviolet light) and emit long-wavelength visible light, making it fluorescent.

2.Uses: Colorants are often used in dyes, paints, inks, food additives, textiles and other fields to give objects or solutions a specific color.

They can achieve a coloring effect by interacting with the surface of an object or dissolving into a liquid. Fluorescent agents are mainly used in fluorescent labels, luminescent materials, fluorescent dyes, luminous materials and other fields, and are used to manufacture products or materials with fluorescent effects, such as highlighters, luminous stickers, luminous watches, etc.

It is important to note that some fluorescents can also have the function of coloring at the same time. For example, in some cases, fluorescents may be added to liquids or materials to fluoresce brightly through their fluorescent properties and also provide a faint coloring effect to objects or solutions. Therefore, fluorescents may sometimes be used as a form of colorant in specific applications.

In general, colorants and fluorescents differ in their properties and uses, but in some cases there are overlapping and cross-cutting applications. <>