i like to know all about dyes?
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A dye can generally be described as a colored substance that has an affinity to the substrate to which it is being applied. The dye is usually used as an aqueous solution, and may require a mordant to improve the fastness of the dye on the fiber. In contrast, a pigment generally has no affinity for the substrate, and is insoluble.\n\nArchaeological evidence shows that, particularly in India and the Middle East, dyeing has been carried out for over 5000 years. The dyes were obtained from either animal, vegetable or mineral origin, with no or very little processing. By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale.\n\nOrganic dyes\nThe first man-made organic dye, mauveine, was discovered by William Henry Perkin in 1856. Many thousands of dyes have since been prepared and, because of vastly improved properties imparted upon the dyed materials, quickly replaced the traditional natural dyes. Dyes are now classified according to how they are used in the dyeing process.\n\nAcid dyes are water-soluble anionic dyes that are applied to fibers such as silk, wool, nylon and modified acrylic fibers using neutral to acid dyebaths. Attachment to the fiber is attributed, at least partly, to salt formation between anionic groups in the dyes and cationic groups in the fiber. Acid dyes are not substantive to cellulosic fibers.\n\nBasic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. Usually acetic acid is added to the dyebath to help the uptake of the dye onto the fiber. Basic dyes are also used in the coloration of paper.\n\nDirect or substantive dyeing is normally carried out in a neutral or slightly alkaline dyebath, at or near boiling point, with the addition of either sodium chloride (NaCl) or sodium sulfate (Na2SO4). Direct dyes are used on cotton, paper, leather, wool, silk and nylon. They are also used as pH indicators and as biological stains.\n\nMordant dyes require a mordant, which improves the fastness of the dye against water, light and perspiration. The choice of mordant is very important as different mordants can change the final colour significantly. Most natural dyes are mordant dyes and there is therefore a large literature base describing dyeing techniques. The most important mordant dyes are the synthetic mordant dyes, or chrome dyes, used for wool; these comprise some 30% of dyes used for wool, and are especially useful for black and navy shades. The mordant, potassium dichromate, is applied as an after-treatment.\n\nLook up leuco form in Wiktionary, the free dictionary.Vat dyes are essentially insoluble in water and incapable of dyeing fibres directly. However, reduction in alkaline liquor produces the water soluble alkali metal salt of the dye, which, in this leuco form, has an affinity for the textile fibre. Subsequent oxidation reforms the original insoluble dye.\n\nReactive dyes utilize a chromophore containing a substituent that is capable of directly reacting with the fibre substrate. The covalent bonds that attach reactive dye to natural fibers make it among the most permanent of dyes. "Cold" reactive dyes, such as Procion MX, Cibacron F, and Drimarene K, are very easy to use because the dye can be applied at room temperature. Reactive dye is by far the best choice for dyeing cotton and other cellulose fibers at home or in the art studio.\n\nDisperse dyes were originally developed for the dyeing of cellulose acetate, and are substantially water insoluble. The dyes are finely ground in the presence of a dispersing agent and then sold as a paste, or spray-dried and sold as a powder. They can also be used to dye nylon, triacetate, polyester and acrylic fibres. In some cases, a dyeing temperature of 130 °C is required, and a pressurised dyebath is used. The very fine particle size gives a large surface area that aids diss
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dir.yahoo.com/Science/Chemistry/Education
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um...right...please retype the question. if you want to know more about the branches (inorganic, organic, physical etc) try www.chemistry.org
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No, nothing new.  That is why they tell you to do an allergy test each time you dye (in the instructions).  There are products with more "natural" ingredients (so they say) that you could try.  Do a search and you'll find a lot.\nGood luck.
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The CRC Handbook of Chemistry and Physics has all kinds of good information like that (although it is pricey).\n\nOr, search the web for the specific liquid of interest.
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You will learn a lot from the wikipedia article on this, http://en.wikipedia.org/wiki/Sickle_Cell_Anemia
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Please do tell me when you get any info. I'm also interested
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go here\n\nxpthemes.com
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Try Wikipedia.org that website can tell you almost anything about everything
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This website has a nice step by step explanation of how to make dye using plants:\nhttp://www.pioneerthinking.com/naturaldyes.html\nThis site has a listing of common plants that can be used for dye and a more detailed explanation of how to make the dye.\nhttp://www.kidsgardening.com/growingideas/projects/may03/pg1.html\nHope this is helpful :-)
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I know alittle bit,BUT need more Info.
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www.google.com  \n"info on nitrogen"
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Some sources\n\nhttp://www.textileweb.com/content/homepage/default.asp\n\nhttp://www.tx.ncsu.edu/extension/service/appres/ar_overview.html (click on the different lab links)
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use the legend to help u get information from the map\nthe colours will help u too ex, blue for lakes rivers oceans etc
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Wikipedia has lots of good info and links on color theory:
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In general, dyes can be considered normal chemicals. Try looking into processing some chemicals that you are familiar with, for example ethanol, bleach, vinegar (acetic acid), etc.
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http://en.wikipedia.org/wiki/Color\n\nThis might help out.