As in the case of chlorotriazines and vinylsulphones, dyes containing phosphonic acid groups had been prepared long before their utility a...
Tuesday, December 31, 2013
The Remazol (HOE) vinylsulphone dyes, containing the characteristic 2- sulphatoethylsulphonyl precursor grouping, are intermediate in reac...
Monday, December 30, 2013
For a few months we have been receiving hardly any good news. Amidst the prevailing dread, our garment sector continues to enliven our h...
A fluorine atom is used as the leaving group in the Cibacron F (CGY) range of 2- amino-4-fluoro-s-triazine dyes. The greater electronegativ...
Sunday, December 29, 2013
Reaction of a dichloro-s-triazine dye with an amine at about 25–40°C produces a much less reactive 2-amino-4-chloro derivative as exemplif...
In a typical dye of this type, such as CI Reactive Red 1, the partial polarisation of the ring C=N and C–Cl bonds, because of the greater e...
Saturday, December 21, 2013
Monofunctional systems: Some of the most important monofunctional reactive systems contain only one possible reactive centre, such as th...
Thursday, December 19, 2013
Many reagents can be used to acylate cellulose when it is partially ionised under alkaline conditions but in the production of reactive dye...
It was not until the early 1950s, following the marketing in 1952 by Hoechst of two Remalan (HOE) vinylsulphone dyes capable of reacting w...
Discovery of the first direct dye, depended on various techniques for depositing insoluble colorants inside the amorphous regions of the c...
The four characteristic features of a typical reactive dye molecule are: The chromophoric grouping, contributing the colour and much of...
Sunday, December 15, 2013
BACKED FABRICS: The backed fabrics are those types which employ a face and back weave alternatively on the two sides of the cloth. The...
Friday, December 6, 2013
MOCK LENO WEAVES: Mock lenos, also known as imitation lenos are a variety of weaves of ordinary construction which produce effects that...
WELTS AND PIQUES: Welts and piques are characterized by more or less pronounced ridges and furrows producing a series of ribs, welts or...
Thursday, December 5, 2013
BEDFORD CORDS: The bed ford cords are a class of weaves that produce longitudinal warp lines in the cloth with fine sunken lines in b...
Popular Posts
Popular Posts
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SATIN and SATEEN WEAVES: Satin is a warp faced rearranged twill and sateen is a rearranged weft faced twill. Thus satin is the reverse ... -
CREPE WEAVES: Crepe weaves constitute an useful variety of simple weaves and are also known as “crape” or “oatmeal” fabrics due to thei... -
BEDFORD CORDS: The bed ford cords are a class of weaves that produce longitudinal warp lines in the cloth with fine sunken lines in b...
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HUCK A BACK WEAVES: The huck a back weaves are basically toweling fabrics. They are generally associated with honey comb fabrics and he... -
BACKED FABRICS: The backed fabrics are those types which employ a face and back weave alternatively on the two sides of the cloth. The...
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MOCK LENO WEAVES: Mock lenos, also known as imitation lenos are a variety of weaves of ordinary construction which produce effects that...
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HONEY COMB WAVES: The honey comb weaves derive their name from their partial resemblance to the hexagonal honey comb cells of wax in ... -
BASIC LOOM MECHANISM: The basic mechanisms in any type of loom can be classified as follows: Primary motions Secondary motions, and ... -
WELTS AND PIQUES: Welts and piques are characterized by more or less pronounced ridges and furrows producing a series of ribs, welts or...
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PLAIN WEAVE: The plain weave is variously known as “calico” or “tabby” weave. It is the simplest of all weaves having a repeat size of 2....