CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.
Defn: An artificial organic base, obtained by oxidizing a mixture of aniline and toluidine, and valuable for the dyestuffs it forms.
Sulphuric acid in a quantity equal to half the weight of the dyestuffs used, together with four times that quantity of Glauber's salt is added to the dyebath.
For dyestuffs and chemical drugs delivered under Paragraph 1 the price shall be fixed by the commission, having regard to pre-war net export prices and to subsequent increases of cost.
Germany accords to the Reparation Commission an option to require as part of reparation the delivery by Germany of such quantities and kinds of dyestuffs and chemical drugs as the commission may designate, not exceeding 50 per cent.
German production of such dyestuffsand chemical drugs during the previous six months' period.
The above expression "dyestuffs and chemical drugs" includes all synthetic dyes and drugs and intermediate or other products used in connection with dyeing, so far as they are manufactured for sale.
The advantage of the artificial dyestuffs over those found in nature lies in their variety and adaptability.
A more technical bulletin by the same author is "Artificial Dyestuffs Used in the United States," Special Agents' Series, No.
I will give a million dollars to anybody finding in nature dyestuffsas numerous, varied, brilliant, pure and cheap as those that are manufactured in the laboratory.
And this morning Amalgamated Dyestuffs went all to blazes.
The whole of the cash, two–thirds of the ships, and a quarter of the dyestuffs accrued to Great Britain.
Some dyestuffs were delivered, and a certain quantity of coal.
His mother could not afford to buy the turmeric, indigo, kermes, and other dyestuffs brought from far countries or grown in gardens.
After a while she left the work to the weavers and watched Mary Lavender makingdyestuffs under Tomaso's direction.
The more costly dyestuffs were made from plants which did not grow wild in England, or from minerals.
Thus in a contract between the cities of Bologna and Ferrara, in 1194, the dyestuff kermez is referred to as grana de Brazile and Brazil wood, bothdyestuffs at that time being obtained from India.
Many of the names of the dyestuffs have come down to us, some of them still in use at this time and others obsolete.
America are manufactured, as well as dyestuffs and chemicals.
A lot of dyestuffs mysteriously left Germany recently in spite of the embargo, and got to Holland, billed to America, where it remains, awaiting a permit from the British.
Then, too, a dye which will color silk may not have any effect on wool in spite of the fact that wool, like silk, is an animal fiber; and certain dyestuffs to which cotton responds most beautifully are absolutely without effect on linen.
So great was the commercial demand fordyestuffs that large areas of land were given over to the exclusive cultivation of the more important dye plants.
Then, too, dyestuffsare themselves more or less affected by light, and fade slowly under a strong illumination.
When sulphonating and especially when condensing substances, black dyestuffs or very finely divided carbon in the colloidal state are often formed.
Further, it may be noted that leathers tanned--with Neradol D fix basic coal-tar dyes excellently, whereas acid and substantive dyestuffs are fixed with other than their natural shades.
Also, one of a group of dyestuffsresembling chrysoïdine proper.
A name given to any one of several yellow or scarletdyestuffs of artificial production and complex structure.
Just as the textile trade of the United States was dependent upon the German dyestuffs for colours, so the sugar beet growers of America were dependent upon Germany for their seed.
With the introduction of aniline dyestuffs about 1870 sulphuric acid came into universal use as a means of clearing the skin before entering the dyebath.
The wide range of colours offered by the new dyestuffs fascinated the public, which accepted the new leathers without question as to their durability.
Many manufacturers of dyestuffs have said the very same thing to me, but, independently of this, I know it, and can prove it with the greatest ease.
Numerous descriptions of methods of using coal-tar dyestuffs in hat-dyeing are available in different volumes of the Journal of the Society of Chemical Industry, and also tables for the detection of such dyestuffs on the fibre.
In classifying the different dyestuffs and colouring matters it is, of course, necessary to consider first the properties of those colouring matters generally, and secondly the particular reason for making such classification.
We will briefly consider now the dyestuffs mentioned in Group (a).
But it may be asked, "How does that highest and best method of classifying the dyestuffs affect the users, the dyers, in their processes?
Under this head there may be arranged a few dyestuffs which, although capable of inclusion under one or other of the foregoing groups, it is more convenient to treat of separately.
The dyestuffs recommended for application in the manner described are: Benzo nitrol brown, toluylene brown, direct fast brown, Pluto black, direct blue black.
With many dyestuffs it is preferable to use 1/6 to 1/3 oz.
These dyestuffs are only suitable for dyeing the vegetable fibres, since they must be applied in a strongly alkaline bath.
Some of these are not at all attracted by it, and are incapable of being used as dyestuffs for cotton.
The importance of the above-mentioned natural dyestuffs is gradually diminishing in favour of mordant dyestuffs and others derived from coal-tar.
On the other hand the number of fast dyestuffs suitable for cop dyeing is very limited.
The Ministry has withheld the data as to the exact nature of the raw materials wanting, but it may be surmised that raw cotton and dyestuffs are among the chief items.
Lack of dyestuffs and other chemicals is hampering many other industries.
Since cotton has not the same attraction for dyestuffs as wool it is a difficult task to dye a fabric woven with cotton and wool so that both fibers will be identical in depth of color, tone, and brightness.
Few of the natural dyestuffs attach themselves permanently without use of a mordant.
Different fibers and fabrics attract dyestuffs with varying degrees of force.
The manufacture of dyestuffs will illustrate: This process, which originated in England, was permitted to pass to the Germans, who practically got a world monopoly in it.
England, for instance, will manufacture dyestuffs not only for her textile trades, but because coal-tar products are essential to the making of high explosives.
He next turned to the rosaniline dyestuffs (the magenta of Sir W.
The dyeing is done in pots in the old-fashioned way and until recently the dyestuffs were obtained from mosses, lichens, heather, broom, and other plants.
Sidenote: Natural Dyestuffs] Indigo for blue, madder for Turkey red, logwood with fustic for black, cutch or gambia for browns on cotton are about all the natural dyestuffs which are used to any extent commercially at the present time.
How does their affinity fordyestuffs compare with wool and silk?
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "dyestuffs" in a variety of sentences. We hope that you will now be able to make sentences using this word.
