Types of dyes and trends

Dyes are materials that are able to make a certain color attached to the fibers. Dyestuff are usually soluble in water, some dyes require a mordant dye adhered on fiber. Archaeological data shows that dyeing technology in India and Middle East has over 5,000 years of history.

Wide range of dye can be divided into natural dyes (such as vegetable dyes, dye and animal mineral dyes) and synthetic dyes (or artificial dyes) according to sources. According to the molecular structure, it classified into azo dyes, Anthraquinone dye, phthalocyanine dyes, aromatic Nitro methane dyes, dyestuff and so on. According to application methods, it includes acid dyes, basic dyes, sulfur dyes, direct dyes, reactive dyes, dispersion and so on.

Natural dyes are dyes obtained from animal, vegetable and mineral. According to sources can be divided into:

I. Plant dyes Dyes extracted from the roots, stems, leaves and fruit of certain plants, such as Indigo extracted from leaves of Indigo (blue), curcumin extracted from turmeric (yellow), alizarin (red) extracted from madder.

II. Animal dyes Dyes extracted from animal bodies, such as carmine extracted from cochineal.

III. Mineral dyes Dyes extracted from colored inorganic of minerals, such as chrome yellow, Ultramarine and manganese Brown. Compared with the artificial dye, natural dyes has many shortcomings, such as incompetence, inconvenience and poor colour fastness of color spectrum.

Synthetic dye, also called " man-made dyes". Mainly formed by chemical processing of coal-tar (or oil) fractionation products (such as benzene, naphthalene, anthracene and carbazole, etc), it sometimes called a coal tar dye. As the earliest of several synthetic dyes made from aniline, also it also known as "aniline dyes." Compared with natural dyes, synthetic dyes have wide range of types, complete chromatography, light color and can be mass produced. So the current so-called dye almost are all synthetic dyes.

Dye has a rapid development since the 70 's of the 20th century, the main purpose of the 90's is to develop new products and improve quality. The rapid development of dyes in China is the 80's, its main role is also improve quality since the 90 's. Meanwhile, production has maintain a certain growth rate. Dyes used in textiles accounted for 85%, the rest used for the dyeing of leather, plastic, paper, coatings, etc.

In accordance with the requirements of eco-textiles and disables 118 kinds of dyes, green dye has been the focus of dyes and dyeing industries. Green dye is an extremely important condition to ensure textile ecological. In addition to the necessary dyeing properties, the technology applicability, application performance and the fastness properties, green dye also need to meet the requirements of environmental protection.

Textile dye and printed textiles

Chemical dye is a huge industry, it involves a number of different structures, different types of organic chemical synthesis. The Classification are direct dyes, acid dyes, reactive dyes, disperse dyes and cationic dyes and metal complex dyes, and so on. There are hundreds of different colors of each category, and each color's chemical structure is completely different with other color's.

With the improvement of the world economy, people's demand for apparel, textiles is more and more personalized and diversified, which requires traditional textiles shift to more variety and small batch production. Textiles or fabrics art is one of the oldest forms of art known to humanity. The textile digital ink jet printing technology is characterized by high quality and short process, the production process is short and quick, therefore it can better meet the demands of instant delivery.

Most of the fabrics being produced and traded between several countries today. The output of China printed textiles ranked first in the world, but about half the price of similar products in developed countries. Digital ink-jet printing products is a new product that can greatly satisfy people's personalized consumer demand. Its application will not only greatly enhance the country's competitiveness in the world market, but also promote technical exchanges and the standard of living of the peoples of the world. The coating digital ink-jet printing technology is one of the focuses on the development of green dyeing and printing techniques at the international level, and it has entered the stage of industrial application.

Textile dye is a dye used in textile dyeing. They are mostly plant fruit, tree SAP and other plant extracts, also contain natural chemicals such as coal tar extract. It is divided into natural dyes and synthetic dyes, and synthetic dyes can be seen easily on the market. With the development of high tech, we can enjoy dyeing our own textiles with natural or synthetic colours today. Dyes have the property to show an affinity towards the substrate. They are applied to plastic, cement, cosmetics, rubber, paper, textiles, medicine, etc.

As we all know, textile digital printing technology originally used to identify, mark, technical textiles, household decorations, and underlying dye. Digital printing inks containing acid dyes, disperse particles and active substance with the pigment and so on. The technology can be used to print the sample and sampling, the use of methods are more cost-effective than traditional. More information, please visit http://www.okchem.com/.

Knowledge of Natural dyes

Natural dyes fall into three categories: plant, animal and mineral. Mostly, natural dyes come from dye plants. Vegetable dyes are extracted from the roots of the plant, stem, leaf and fruit extract; fewer animals dyes mainly taken from the bodies of shellfish and cochineal, such as: worm (purple) glue, such as cochineal, Kermes; mineral dyes are extracted colored inorganic  from mineral substances, such as chrome yellow, Ultramarine and manganese Brown, and so on. In recent years, the pigments produced by bacteria, fungi, mold and other microbes are found can be used as a source of natural dyes.

United Kingdom researchers say: palmate chrysosporium, coarse fiber holes and other large fungi can be used as a natural dye for staining. Japan insect silk Institute of agricultural technology cooperation with the silk trading company research found that microbes can produce purple pigments used for dyeing. Fungal pigments can also be used for dyeing. Our researchers try the monascus pigment to dye silk and get a beautiful deep red. Detection shows that these microorganisms were non-pathogenic bacteria. Therefore, the pigment is safe.

Because of the varying natural dye molecules, staining methods are not the same. There are 4 kinds of staining methods:

Direct staining  Some natural pigments of plant dye has a good solubso direct staining is a good way, such as gardenias, turmeric and so on.

Mordant dyeing method  Certain plant dye pigments have a fine water solubility, solution components can be directly adsorbed on the fiber,  but in order to improve the color fastness, a mordant dyeing method is required.

Restore method  Natural pigment compounds already exists in plants, while resulting in water insoluble pigments in the dyeing process, such as bluegrass.

Other staining methods  Dye on the fiber according to the natural pigments of plant dye have different acid and alkali solubility, such as saffron, turmeric.

Natural dye mainly used natural fibers (wool, linen, silk, wool) and most of the man-made fibers (soybean fiber, milk fiber, bamboo fiber, modal), textiles, clothing, and clothing decorations. Also it can be used in arts crafts, leather goods, wood products, cosmetics.

Natural dyes are suitable for the development of high-value green products, the future of natural dyed fabric is very promising. The superiority of natural dyes can be particularly in the health underwear products and home textile products. More information, please visit http://www.okchem.com/.