by MEBuell
Last updated 8 years ago


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B) The only way to distinguish between synthetic and natural dyes is through laboratory analisais. However, one visual difference beteween the two is that natural dyes show subtle gradation of colors while synthetic dyes penetrates the fiber evenly. Exposure to light will cause synthetic dyes to fade and have a softer look. Synthetic dyes are manmade, while natural dyes are found in nature.

A)Mordant- Reagent, such as tannic acid, that fixes dyes to cells, tissues, or textiles.Indigo- A blue dye obtained from any of the various shrubs or herbs of the genus Indigofera in the pea family or produced syntheticallyChromophores- Chemical group capable of selective light absorption resulting in the coloration of certain organic compoundsMadder- Red dye obtained from the roots of the southwest Asian perennial plant Weld- Coloring matter or dye extracted from an herb Woad- The dye obtained from the annual Old World plant

***TIE DYE***

G)The intermolecular bonds which hold direct dyes to fabric are weak. Strong covalent bonds are found between fiber reactive dyes.

C) The main difference between dyes and pigments is dyes are dissolved in whatever solvent is used while pigments are insoluble.

E)Indigo, Saffron, Confederate gray, Woad Blue, Bloodroot, Murex, TurmericF)Mordant, Sulfur, Vat, Acid, Azoic, Chrome


H)33 percent of plant matter is cellulose, making it the chief constituent of all plant tissue and fiber. It is the most common organic polysaccharide on Earth. The cellulose formula is C6H10O5.



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