AZOIC DYES PDF

Azoic dye definition is – any of a group of water-insoluble azo dyes formed by coupling of the components on the fiber —called also ice color, ingrain dye. The dyes containing azo groups – N = N – are called Azoic Dye. These are not ready made dyes but are produced by reaction of two. Structure, Chemical Name, CAS, MF. 4-Chloronitroaniline · , C6H5ClN2O2. 3-Chloromethylaniline · , C7H8ClN. 2-Amino

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This problem can be rectified by boiling the fabric in soap. From this reaction the required insoluble AZO dye is produced.

But we learn about the printing of cotton fabric with azoic dye. To make them soluble in water the textile materials are impregnated in a solution of Napthol and NaOH. It has good color fastness. Poor to very good, Index 2 — 7.

Now this liquor and sample are to come in an oxidizing action in the presence of air or an oxidizing agent.

The required color can be changed by altering of the diazoic and coupling components. Alkali resistance is poor to good.

In alkaline solution, coupling is done. All the chemicals according to the recipe are mixed with water to make a suitable solution.

Azoic dyes are used for producing bright shade of color such as orange, red, scarlet, navy blue, and black color. The quantity of hydro — sulphide is increased in the case of yellow combination. And is one way more correct than the others? It should be noted here that, azoic dye is different from other dye and dyws application process dyew different from others. Brightness of shade is also admirable.

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By treating a fiber with diazoic and coupling components, this process can be achieved. Azoic coupling components are insoluble in water. This dye stuff is called developed dye due to formation of dye in fiber during dyeing aaoic. Share to Twitter Share to Facebook. Properties of Azoic Dyes: Because of high degree of brightness, ease of application and excellent fastness properties except rubbing fastness which can be improved by using certain auxiliaries azoic combinations naphthol and bases are widely used in printing on cellulose fiber fabrics.

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Azoic dyes

Like Us On Facebook. The naphtholated fabric is then printed with base printing paste by block and screen printing method. In Azoic Dyes insoluble azo group dye present. Napthol dispersed in alcohol, T. Then squeeze and dry. Azoic dye is that which has insoluble azo group. Resources for azoic dye Time Traveler! Finally add NaCl in the developing bath. Learn More about azoic dye. The awkward case of ‘his or her’.

It has ability to absorb light.

Azoic Dyes,Nepthol Dyes,Azoic Dyes Manufacturer,Nepthol Dyes Supplier

And mixed them very well. After printing the printed fabric is dried at for minute in a dryer. This is known as diazotization. Each and every Spam Comment will be deleted soon.

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The yellow azoc with AS — G and azzoic with napthol of high substantivity are the most difficult one to strip. How to use a word that literally drives cyes people nuts. Properties and Advantages of Azoic Dye. For making naphthol solution, at first naphthol and glycerine are added in dye bath. Dyestuff always used in cellulosic materials. In Greek, a means not and zoe means to live. Ask the Editors Word of the Year: Here, final color is produced within few seconds after immersing the next materials in the dye solution.

It is produced by reacting two components named coupling method and diazo component. Pages Home Details Sitelisting two. Start your free trial today and get unlimited access to America’s largest dictionary, with: Function of different chemicals used in Napthol Dyeing. Brightness of azoic dye is good. These dyes are not found in readymade form.

Dyes for Protein Fibers. Two bath of individual recipe is used for dyeing with azo dyes. Dyeing operation is completed by two bath arrangement such as developing bath and impregnating bath. Then fabric is immersed into this solution for xzoic minutes.