It dyes silk and mordanted cotton a fine scarlet.
This has a strong attraction for basic aniline dyes, and can usually be distinguished from other parts of the cell which are more easily colored by acid anilines.
It has an increasing trade in iron, timber, coal and agricultural products, a trade which is fostered by a harbour opened in 1897; and also large factories for making aniline dyes and soda.
There are about thirty species of medicinal plants, twelve used for condiments, and twelve for dyes and tanning.
This has led to the estimation of sugar by means of the polarimeter, and of the calorific power of fuels, and the valuation of ores and metals, of coal-tar dyes, and almost all trade products.
A clear distinction must be drawn between colour and the property of dyeing; all coloured substances are not dyes, and it is shown in the article Dyeing that the property of entering into chemical or physical combination with fibres involves properties other than those essential to colour.
Borage and Pulmonaria, were formerly used in medicine, and the roots yield purple or brown dyes, as in Alkanna tinctoria (alkanet).
Taught the people how to prepare dyes from the plants and lichens, and many of the patterns still show signs of Moorish origin.
Different substances were distinguished by the name of "alumen"; but they were all characterized by a certain degree of astringency, and were all employed in dyeing and medicine, the light-coloured alumen being useful in brilliant dyes, the dark-coloured only in dyeing black or very dark colours.
Among the city's manufactories are breweries, iron and brass foundries, stove factories, knitting mills, cotton mills, clothing factories, slaughtering and meat-packing establishments, cigar and cigarette factories, and manufactories of adhesive pastes, court plaster, spring beds, ribbed underwear, aniline dyes, chemicals, gas meters, fire-brick, and glazed paper and cardboard.
The introduction of cheap cottons and silk fabrics has dealt a blow to hand-weaving, while aniline dyes are driving out the native vegetable product; but both industries still linger in the rural tracts.
It is the chief centre in Germany of the cotton, wool, silk and velvet manufactures, and of upholstery, drapery and haberdashery of all descriptions, of printed calicoes, of Turkey-red and other dyes, and of fine chemicals.
The latter on reduction yields a diamino compound, the disulphonic acid of which on diazotization and coupling with a phenol, &c., gives valuable substantive cotton dyes after the type yielded by Benzidine.
Stahl, as late as 1702, quoted the formation of brass as a case of the union of a metal with an earth into a metallic compound; but he subsequently adopted the view propounded by Kunckel in 1677, that "cadmia" is a metallic calx, and that it dyes the copper yellow by giving its metal up to it.
Its principal imports are cotton and woollen goods, yarn, metals, sugar, coffee, tea, spices, cashmere shawls, &c., and its principal exports opium, wool, carpets, horses, grain, dyes and gums, tobacco, rosewater, &c. The importance of Bushire has much increased since about 1862.
The a-naphthylamine sulphonic acids are used for the preparation of azo dyes, these dyes possessing the important property of dyeing unmordanted cotton.
The imports are chiefly cotton yarn and piece goods, kerosene oil, palm-leaf fans, aniline dyes, sugar and matches.
Edible plants, and those for dyes and medicines, were on their lists, as well as wood for tools, utensils and weapons, and fibres for textiles.
It exported iron from Elba, mosaics, pottery, manufactured locally with earth from Ischia (which was in considerable demand until 1883), sulphur (which indeed was extracted in the neighbourhood until the 18th century), probably alum (which is still worked), perfumes, pozzolana earth (taking its name from the place), cretaceous earth for mixing with grain (alica) from the Leucogaean hills, glass cups engraved with views of Puteoli, mineral dyes (the blue invented.
It is an important steamboat station for both passenger and cargo traffic, and besides manufactures of cement, dyes and soap, has a considerable trade in the wines of the district.
The mastication causes a copious flow of saliva of a brick-red colour, which dyes the mouth, lips and gums. The habit blackens the teeth, but it is asserted by those addicted to it that it strengthens the gums, sweetens the breath and stimulates the digestive organs.
In studying the dispersion of the aniline dyes, a prism with a very small refracting angle is made of two glass plates slightly inclined to each other and enclosing a very thin wedge of the dye, which is either melted between the plates, or is in the form of a solution retained in position by surface-tension.
This industry was ruined by the competition of chemical dyes, and a substitute was found in the cultivation of coffee.
It crystallizes in red octahedra and dyes silk and wool yellow.
Which are readily soluble in hot water, and it dyes mordanted cotton a dark brown.
- Among the disadvantages under which the silks of the wild moths long laboured one of the most serious was the natural colour of the silks, and the extreme difficulty with which they took on dyes, specially the light and brilliant colours.
The wauke plant (Broussonetia papyrifera), and to a less extent the mamake (Pipturus albidus) and Boehmeria stipularis, furnished the bark out of which the famous kapa cloth was made, while the olopa (Cheirodendron gaudichaudii) and the koolea (Myrsine lessertiana) furnished the dyes with which it was coloured.
- Of these the most important are such as yield, by maceration in ammonia, the dyes known in commerce as archil, cudbear and litmus.
Amongst other lichens affording red, purple or brown dyes may be mentioned Ramalina scopulorum, Parmelia, saxatilis and P. omphalodes, Umbilicaria pustulate and several species of Gyrophora, Urceolaria scruposa, all of which are more or less employed as domestic dyes.
Yellow dyes, again, are derived from Chlorea vulpina, Platysma juniperinum, Parmelia caperata and P. conspersa, Physcia jlavicans, Ph.
The Fox river furnishes about 10,000 h.p., which is largely utilized for the manufacture of paper (of which Appleton is one of the largest producers in the United States), wood-pulp, sulphite fibre, machinery, wire screens, woollen goods, knit goods, furniture, dyes and flour.
Other articles of manufacture are leather, tobacco, porcelain, cement, spirits, lead pencils (Nuremberg), plate-glass, sugar, matches, aniline dyes, straw hats and baskets.
It dyes silk, wool and leather direct, and cotton after mordanting with tannin and tartar emetic (see Dyeing).
It acts as a weak antiseptic. It is used for enriching coal gas, as a vermin killer, in the manufacture of certain azo dyes, and in the preparation of phthalic acid (q.v.).
It forms orange-yellow plates and dyes wool a golden yellow (from an acid bath).
7 - trisulphonic acid, is an orange-yellow powder which dyes wool and silk yellow (from an acid bath).
With, however, recent experiments in brown and skunk coloured dyes, it bids fair to become a popular fur.
The imports consist mainly of raw material for working up in the factories of the district, while the principal exports are coal, fruit, wine, dyes, cloth, silk and other manufactured articles of various descriptions.
Fifteen plants are known to furnish dyes, and eight are sources of fibre - the caraguatay especially being employed in the manufacture of the exquisite nanduty or spider web lace of the natives.
Commercially, Cologne is one of the chief centres on the Rhine, and has a very important trade in corn, wine, mineral ores, coals, drugs, dyes, manufactured wares, groceries, leather and hides, timber, porcelain and many other commodities.
They employ vegetable dyes for painting their bark-cloth, calabashes, &c. In some islands they also use a red earth for this purpose.
But the first Greek historian who speaks clearly of India was Hecataeus of Miletus (549-486 B.C.); the knowledge of Herodotus (450 B.C.) ended at the Indus; and Ctesias, the physician (401 B.C.), brought back from his residence in Persia only a few facts about the products of India, its dyes and fabrics, its monkeys and parrots.
The village system is well described, each little rural unit seeming to be an independent republic. Megasthenes remarked the exemption of the husbandmen (Vaisyas) from war and public services, and enumerates the dyes, fibres, fabrics and products (animal, vegetable and mineral) of India.
Dye-woods and indigo are exported, but the demand for vegetable dyes has decreased.
Among the valuable vegetable products forming articles of export are various gums and dyes, the most important being gum tragacanth, which exudes from the astragalus plant in the hilly region from Kurdistan in the north-west to Kermn in the south-east.
The export of dyes in1906-1907was, 985 tons, valued at 32,326.
The principal imports into Persia in approximate order of value are cottons, sugar, tea, woollens, cotton yarn, petroleum, stuffs of wool and cotton mixed, wool, hardware, ironmongery, matches, iron and steel, dyes, rice, spices and glass-wdre.
They are skilled in the use of dyes, and the Indian women pride themselves on a large number of finely-woven, brilliantly-coloured petticoats.
In these latter the basic aniline dyes in solution are almost exclusively used, on account of their special affinity for the bacterial protoplasm.
Kid gloves, tobacco, dyes and spirits are manufactured.