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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.
"Lyocell" has become a genericized trademark, used to refer to the Lyocell process for making cellulose fibers. [ 3 ] [ 6 ] The U.S. Federal Trade Commission defines Lyocell as "a fiber composed of cellulose precipitated from an organic solution in which no substitution of the hydroxy groups takes place, and no chemical intermediates are formed".
Dyeing Pigments for sale at a market in Goa, India Cotton being dyed manually in contemporary India Silk dye in pan on stove. Khotan. Dyeing is the application of dyes or pigments on textile materials such as fibers, yarns, and fabrics with the goal of achieving color with desired color fastness.
French chemist François-Emmanuel Verguin reacted aniline with stannic chloride to yield fuchsine, a rose colored dye, the first of the triphenylmethane dyes. 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]
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 ...
The safety of Red Dye No. 3 is not something that the average person needs to be concerned with, unless their diet is comprised mainly of maraschino cherries, red decorating icing, and Valentine ...
During the dyeing process, the dye must become close and even with the material in order to produce a uniform color that is fast to moisture, heat, and light. [5] Due to their superior fastness properties and simple application, reactive dyes are currently the most common type of dye for cotton dyeing. [6] The CPB technique uses less water and ...