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1 the dyes are differentially insoluble in standart photoresist solvents
Универсальный англо-русский словарь > the dyes are differentially insoluble in standart photoresist solvents
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2 degrade the brilliancy of the dyes
Макаров: ослабить сочность красокУниверсальный англо-русский словарь > degrade the brilliancy of the dyes
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3 Dyes
The following list gives a general classification of colouring matters for dyeing textile fibres: - Acid Colours dye animal fibres only and have no affinity for cellulose. If union goods are dyed with acid dyes the cotton remains white and the wool is dyed. They dye wool and silk from baths containing Glauber's salt and some acid, hence their name. Acid colours consist principally of the Azo compounds and are fairly cheap, so are used for the dyeing of dress materials, suitings, etc. No preparation of the fabric is necessary prior to dyeing. Wool and silk fabrics ate simply steeped in a warm acidified solution. Azo Dyes - These are colouring matters used for cotton dyeing and are developed direct on to the fibre. Basic Dyes - Cotton has no direct affinity for basic dyes, which consist of colour bases in combination with other chemicals, as tannic acid, sumach, or other tanning substances. Tannic acid is taken up by cotton which will then absorb the basic colours. They are very bright but not very fast. They dye wool and silk direct from plain baths. Developing Colours - See Developing Colours. Direct Cotton Colours - Dye cotton, linen, wool or silk directly, will dye cotton direct but by the addition of various salts deeper shades are obtained. With the addition of a little acid will dye wool and silk. See direct Dyes. Mordant Colours - As a rule these are very fast to washing and mostly fast to; light, such as logwood, black, Turkey red, etc. The mordant forms insoluble compounds with the colours, which are then applied to the fibres so that the insoluble coloured compounds are formed within the fibres The cotton is prepared first with some metallic mordant, as chrome, iron or alumina. Substantive Dyes - Have the property of dyeing fibres direct. They are Direct Dyes, that is they have an affinity for fibres. Sulphur and vat dyes are substantive towards cotton. Sulphur Colours are used for vegetable fibres only. These colours are insoluble in water and require the addition of sodium sulphide which converts them into soluble substances which will dye cotton. Usually fast to washing and alkalis - not so fast to bleaching (see Sulphur Colours). Vat Colours - These are fast dyes for cotton. They are insoluble in water so are converted into a soluble compound by some chemical reducing agent, and then they have a direct affinity for cotton which is dyed when immersed in the solution. There are two main classes, those prepared from anthraquinone and those related to indigo. They will dye viscose and cuprammonium rayons (see Vat Dyes) -
4 the development of a laboratory method for quantifying the bioelimination of anionic, water soluble dyes by a biomass
Универсальный англо-русский словарь > the development of a laboratory method for quantifying the bioelimination of anionic, water soluble dyes by a biomass
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5 dyes are used for the coloration of textiles
Универсальный англо-русский словарь > dyes are used for the coloration of textiles
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6 the dynamics of electron injection from excited state dyes into semiconductors
Универсальный англо-русский словарь > the dynamics of electron injection from excited state dyes into semiconductors
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7 Direct Dyes
These dyes have a great affinity for cotton. The dye is dissolved in water to bring it to the right temperature, and then the cloth is immersed for a short time. A number of very fast direct dyes are now obtainable (see Dyes) -
8 Basic Dyes
These are dyes that require the assistance of a mordant to make them permanent, when used for cotton dyeing. They are useful for dyeing wool, because the fibre contains acid properties with which the dye combines, but as the combination is not fast, the basic dyes are not much used for wool. -
9 Vat Dyes
Vat dyes are fast, especially to washing. They are called vat dyes because, being originally insoluble in water, they undergo special preparation in large vats, where they are made soluble by the action of caustic soda and hyposulphite. In this liquor the fabrics are treated. Certain other chemicals are added which change the dyestuff back to the insoluble form in the fibre. This is called the fixing process. -
10 Sulphur Dyes
Fast dyes that contain sulphur and are used for dyeing cotton fabrics, mostly in dark shades. Nearly all colours except reds have been produced in this group. The sulphur blacks, blues and browns are among the fastest dyes produced. They are fast to light, washing, acids and perspiration (see Dyes) -
11 Adjective Dyes
Dyes which must be used with mordants. The word adjective applied to dyestuffs means that the fibre has no affinity for them and that a mordant is required to fix the dye on the fibre. Basic and mordant dyes are adjective. -
12 Acid Dyes
Dyes used principally for wools and silks and include both fast and loose colours. They are all acid in character. Are not used for dyeing cotton. They are easily applied to animal fibres and give even shades in the cloth. They consist chiefly of azo compounds used for dress fabrics, suitings, carpets, etc. The fabric needs no preparation before dyeing and wools and silks are simply dipped into the warm solutions (see Dyes) -
13 Chloramine Dyes
The direct dyes produced by the Farben Fabriken Co., Germany (see Dyes) -
14 Developing Dyes
Colour substances which, although they have some affinity for textiles, are not brought out in full hue until a developing process has been applied. Ice water is one of the commonest developing agents used. (This group of dyes is not very important) -
15 Natural Dyes
These are the oldest dyes and include such vegetable colours as indigo, cutch, fustic, logwood, butternut, sumac, madder, brazilwood, quercitron, saffron, turmeric-henna, cudbear, and litmus. Cochineal, an insect, yields another natural dyestuff. Several minerals also are used, as for example Prussian blue, chrome yellow, and iron buff. -
16 chemiexcitation of the xanthene dyes by phthalhydrazide and hydrogen peroxide
Универсальный англо-русский словарь > chemiexcitation of the xanthene dyes by phthalhydrazide and hydrogen peroxide
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17 development of a laboratory method for quantifying the bioelimination of anionic, water soluble dyes by a biomass
Универсальный англо-русский словарь > development of a laboratory method for quantifying the bioelimination of anionic, water soluble dyes by a biomass
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18 luminescent dye selected from the group consisting of cyanine, merocyanine and styryl dyes containing at least one sulfonate group attached to an aromatic nucleus
Общая лексика: люминесцентный краситель, выбранный из группы, состоящей из цианиновых, мероцианиновыхУниверсальный англо-русский словарь > luminescent dye selected from the group consisting of cyanine, merocyanine and styryl dyes containing at least one sulfonate group attached to an aromatic nucleus
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19 синергический эффект
Синергический эффект-- The synergetic effect of mixing finely divided titanium dioxide with opacifying dyes permitted us to use a lesser quantity of dyes than if we used the dyes alone.Русско-английский научно-технический словарь переводчика > синергический эффект
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20 меньшее количество
Меньшее количество (топлива)-- CHP also reduces regional and global pollution by burning less fuel. Меньшее количествоThis synergistic effect permitted us to use a lesser quantity of dyes than if we used the dyes atone.The higher molecular weight gases require a fewer number of stages in the turbomachinery.All three result in fewer peroxy radicals being formed (... приводят к образованию меньшего количества...)Русско-английский научно-технический словарь переводчика > меньшее количество
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