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Cross dyeing is "a method of dyeing blend or combination fabrics to two or more shades by the use of dyes with different affinities for the different fibers". [10] The cross dyeing process can be used to create heather effects, and plaid, check, or striped fabrics.
Doping of a pure silicon array. Silicon based intrinsic semiconductor becomes extrinsic when impurities such as boron and antimony are introduced.. In semiconductor production, doping is the intentional introduction of impurities into an intrinsic (undoped) semiconductor for the purpose of modulating its electrical, optical and structural properties.
The dope dyeing applies to synthetic fiber only. This method of dyeing is also known as solution dyeing [10] and 'mass coloration' or 'mass colored'. It has limited color options. [11] [12] Fiber dyeing: In fiber dyeing, the dyeing takes place at the fiber stage before they are spun into yarn. It is also called stock dyeing.
The like charges repel each other, and the addition of salt aids in dyeing by generating a positive charge on the cotton surface. [7] [8] The industry has predominantly used reactive dyes to color knitted cotton goods. The treatment of salt-laden, colored effluent generated by the dyeing process is one of the industry's primary concerns. Cotton ...
Further work by Hoffman [18] along with the discovery of benzene’s structure (1858) and carbon’s tetravalency(1865), this science built the groundwork for modern organic chemistry. [19] In the late 1860s many companies began offering a full spectrum of colors, and were already outcompeting many natural dyes for market share.
Dietitians explain what red dye number three is, if you should be worried about it, and what to do with the food that has it now that it has been banned. The Fascinating Backstory Behind Red Dye No. 3
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Cudbear is one of the few natural dyes to be credited to a named individual, Dr Cuthbert Gordon of Scotland, who patented the process of its production in 1758. [8] cutch Cutch is an ancient brown dye from the wood of acacia trees, particularly Acacia catechu, used in India for dyeing cotton. Cutch gives gray-browns with an iron mordant and ...