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Indigo dye is an organic compound with a distinctive blue color. Indigo is a natural dye obtained from the leaves of some plants of the Indigofera genus, in particular Indigofera tinctoria. Dye-bearing Indigofera plants were once common throughout the world. It is now produced via chemical routes. Blue colorants are rare.
Blue pigments are natural or synthetic materials, traditionally made from minerals, Being water-insoluble by definition, blue pigments used to make the blue colors in inks and paints. Some major blue pigments are indigo , Prussian blue , and copper phthalocyanine .
The Maya blue pigment is a composite of organic and inorganic constituents, primarily indigo dyes derived from the leaves of anil (Indigofera suffruticosa, called ch'oj in Mayan [1]) plants combined with palygorskite, a natural clay and type of fuller's earth.
Blue is always green for Austria-based fiber firm Lenzing, which just unveiled its latest venture in sustainable denim. Lenzing said its new Indigo Color technology for Tencel branded Modal fibers ...
The earliest known blue dyes were made from plants – woad in Europe, indigo in Asia and Africa, while blue pigments were made from minerals, usually either lapis lazuli or azurite, and required more. [64] Blue glazes posed still another challenge since the early blue dyes and pigments were not thermally robust.
The color blue has been important in culture, politics, art and fashion since ancient times. Blue was used in ancient Egypt for jewelry and ornament. [1] In the Renaissance, blue pigments were prized for paintings and fine blue and white porcelain. In the Middle Ages, deep rich blues made with cobalt were used in stained glass windows. In the ...