NationMaster - Encyclopedia: Dyeing

Dyeing is the process of changing the colour of a yarn or cloth by treatment with a dye. For alternative meanings, see color (disambiguation). ... Yarn Yarn is a long continuous length of interlocked fibers, suitable for use in the production of textiles, sewing, knitting, weaving and ropemaking. ... A variety of fabric. ... A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied. ...

For the majority of the thousands of years in which dyeing has been used by humans to decorate clothing, or fabrics for other uses, the primary source of dye has been nature, with the dyestuff being extracted from animals or plants. In the last two centuries, humans have produced artificial dyes to achieve specific colours, and to render the dyes 'fast', so that they do not run when the material is washed. (See also List of types of clothing) Humans often wear articles of clothing (also known as dress, garments or attire) on the body (for the alternative, see nudity). ... For alternative meanings, see nature (disambiguation). ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa ?Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... Divisions Green algae land plants (embryophytes) non-vascular embryophytes Hepatophyta - liverworts Anthocerophyta - hornworts Bryophyta - mosses vascular plants (tracheophytes) seedless vascular plants Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongue ferns seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering...

Dyes are applied to material by direct application, or by immersing the yarn or cloth in the liquid dye or a solution of the dye. This article or section should be merged with solvent, soluble, and solubility equilibrium Dissolving table salt in water In chemistry, a solution is one or more substance (the solute) dissolved in another substance (the solvent) forming a homogenous mixture. ...

In order to remove natural or unwanted colour from material, the opposite process of bleaching is carried out. In chemistry, to bleach something generally means to whiten it or oxidize it. ...

NPR : David Dye (434 words)
	Dye launched his distinguished broadcasting career as host of a progressive music show on WMMR 93.3FM, a pioneering progressive rock station in Philadelphia.
	Based on the findings, Dye went to work to create a unique program of musical discovery where listeners would be introduced to an eclectic blend of contemporary sounds from legendary and up-and-coming artists.
	Dye is a resident of Philadelphia, Penn., where he lives with his wife, a newspaper columnist, and their two children.

Dye Summary (1806 words)
	Dyes from plants included blue dye from the indigo plant; blue dye from woad; red and brown dyes from the madder plant; yellow, orange, brown, and fl dyes from various trees; orange or red dye from henna; and yellow from safflower and weld.
	Dyes were dissolved and applied to the cloth and the color change would take place either because the dye molecules became bonded to the fiber molecules or because the dye was unable to pass out of the fibers' fine capillaries once it is inside of them.
	The dye is usually used as an aqueous solution, and may require a mordant to improve the fastness of the dye on the fiber.

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