types of dyes - classification based on chemical

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2020/9/8Using this system the different types of dyes are identified Each individual chemical used as a dye is assigned a CI number containing specific identifying five-digit number When specifying dyes for use in a staining method the CI number is specified to avoid confusion in referring to a chemical Dye - Dye - Synthetic dyes: In 1856 the first commercially successful synthetic dye mauve was serendipitously discovered by British chemist William H Perkin who recognized and quickly exploited its commercial significance The introduction of mauve in 1857 triggered the decline in the dominance of natural dyes in world markets Mauve had a short commercial lifetime (lasting about seven

Disperse Dyes

2020/4/5Disperse Dyes The development of disperse dyes was carried-out to permit the dyeing of hydrophobic thermoplastic fibers (ex acetate triacetate nylon polyester acrylic) and other synthetics These dyes are mostly substituted azo anthraquinone or diphenylamine compounds that are sparingly water-soluble and non-ionic

Dyes are classified by their chemical composition the types of fibers to which they can be applied by hue or by the method of application Dye molecules may attach to the surface of the fiber be absorbed by the fiber or interact with the fiber's molecules Each

2020/9/10Types of dyes Textile dyes include acid dyes used mainly for dyeing wool silk and nylon and direct or substantive dyes which have a strong affinity for cellulose fibres ( see table) Mordant dyes require the addition of chemical substances such as salts to give them an affinity for the material being dyed

2020/8/14Dyes may be classified in several ways (e g according to the chemical constitution application class end-use) The primary classification of dyes is based on the fibers to which they can be applied and the chemical nature of each dye Table 6 lists the major

In this chapter dyes will be investigated in two different groups as accordance with chemical structures and application methods The basic classification groups were determined as azo anthraquinone indigo phthalocyanine sulfur nitro and nitroso dyes by considering their chemical structures

Classification and naming of dyes stains and

2020/9/4A classification of dyes and other colorants is proposed based on the chemical features responsible for their visibility and generally consonant with the writings of modern color chemists The scheme differs in several respects from that of the Colour Index (CI) but it retains some traditional small groups of dyes that include biological stains Natural dyes recognized as a group in the CI

These dyes are thereby specifically identified as dyes of the stated colour and which may still be derived from animals or plants Note that this is a classification based on the dye's source and colour It contains no chemical information neither does it imply that

A valuable classification of reactive dye types has been formulated recently [1] Three groups relating to the most important control parameter in each case may be distinguished Group 1: Alkali-controllable reactive dyes These dyes have optimal temperatures of

In this chapter dyes will be investigated in two different groups as accordance with chemical structures and application methods The basic classification groups were determined as azo anthraquinone indigo phthalocyanine sulfur nitro and nitroso dyes by considering their chemical structures

Dyeing is the process of imparting color to the textile fabric using chemical dyes called dyestuff in the aqueous medium The dyestuff are capable of reacting and combining with the textile fiber molecule usually when in a water solution and usually with other auxiliary chemicals to enhance the process

These dyes are thereby specifically identified as dyes of the stated colour and which may still be derived from animals or plants Note that this is a classification based on the dye's source and colour It contains no chemical information neither does it imply that

Classification of dyes Dyes are classified based on following factors Chemical composition Nature of nuclear structure Various industrial uses Sources of origin Miscellaneous factors Dyes which are classified based on chemical composition are Acridine dyes

2010/11/10Dyes may be classified in several ways (e g according to the chemical constitution application class end-use) The primary classification of dyes is based on the fibers to which they can be applied and the chemical nature of each dye Table 6 lists the major

Effect of Dyes on Different Types of Fabrics

Classification of Dye Dye stuff are classified on different bases: 1 Physical form 2 Application form 3 Chemical form Classification of Dyes Based on Physical form 1) Powder form a) Grain form b) Fine powder form c) Micro or ultrafine powder form 2) lump form

Classification of dyes Dyes are classified based on following factors Chemical composition Nature of nuclear structure Various industrial uses Sources of origin Miscellaneous factors Dyes which are classified based on chemical composition are Acridine dyes

2019/6/20Classification of dyes is done based on two factors namely its chemical constitution and secondly its method of application There are innumerable chemical classes reported today and a single dye can belong to multiple chemical classes

azo-type acid dyes direct dyes and pigments based on benzidine and ben- zidine congeners were commercially im- portant and very popular dyestuffs However recent health and environmental concerns about benzidine-based dyes have caused

2019/9/24A Dyes may be classified in several ways (e g according to the chemical constitution application class end-use) The primary classification of dyes is based on the fibers to which they can be applied and the chemical nature of each dye Reactive dyes

In this chapter dyes will be investigated in two different groups as accordance with chemical structures and application methods The basic classification groups were determined as azo anthraquinone indigo phthalocyanine sulfur nitro and nitroso dyes by considering their chemical structures

2019/5/15The natural dyes can be classified in different ways such as based on origin/source type type of hue chemical structure [15 16] and colour components The classification of natural dyes based on origin/source is given below: Vegetable origin Animal origin

Dyeing is the process of imparting color to the textile fabric using chemical dyes called dyestuff in the aqueous medium The dyestuff are capable of reacting and combining with the textile fiber molecule usually when in a water solution and usually with other auxiliary chemicals to enhance the process