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/.