The Acid dye stuff is really called primarily due with 2 factors. In the initially spot these classes of dyestuff were used inside a shower containing mineral or natural acids like sulphuric, acetic or formic acid plus second almost all of them are sodium salts of organics acids.
Properties of Acid Dyes:
1. Acid dyestuff is soluble inside water.
2. These dyes are conveniently used about wool, silk plus nylon fibres,
3. These dyes are used inside the presence of acids like sulphuric, acetic or formic acid.
4. These are typically inside much case soluble inside alcohol.
5. Whenever acid dyestuffs are treated with a reducing agent they are decolorized.
6. These are generally commonly combined with simple dyes.
7. The dyed acid hues have advantageous light fastness plus moderate cleaning fastness. And leveling characteristics:
Classification of Acid Dyes
Acid dyes are split into 3 Groups based on the leveling characteristics
Acid dyes are split into 3 Groups based on the leveling characteristics
A. Acid dyes with Good leveling characteristics
This kind of acid dye is responsible for their superior leveling characteristics. As the dye molecules have less attraction for the fibre they usually migrate just gradually into the polymer systems of wool or nylon fibres. But to get enough substantive plus with guarantee, adequate exhausting agent (sulphuric acid) is put into the dye liquor, their deficiency of substantive is evidence by their bad wash fastness. But the light fastness is great with great.
This kind of acid dye is responsible for their superior leveling characteristics. As the dye molecules have less attraction for the fibre they usually migrate just gradually into the polymer systems of wool or nylon fibres. But to get enough substantive plus with guarantee, adequate exhausting agent (sulphuric acid) is put into the dye liquor, their deficiency of substantive is evidence by their bad wash fastness. But the light fastness is great with great.
B. Acid dyes with average leveling characteristics
The moderate substantive of the kind of acid dye is responsible for average leveling characteristics. To obtain enough substantive plus with plus confirm it, adequate exhausting agent, a week acid (Acetic acid or Formic acid) is put into the dye both. The cleaning fastness of these dyes is fair, while their light – fastness is superior with great.
The moderate substantive of the kind of acid dye is responsible for average leveling characteristics. To obtain enough substantive plus with plus confirm it, adequate exhausting agent, a week acid (Acetic acid or Formic acid) is put into the dye both. The cleaning fastness of these dyes is fair, while their light – fastness is superior with great.
C. Acid dyes with poor leveling characteristics
These dyes are sometimes known because quick acid dyes, plus milling dyes or All-natural dyeing acid dyeing acid dyes. They have the greatest substantive of all of the acid dyes, however, have comparatively bad leveling characteristics. Unless care is taken throughout, their reasonably wise substantive for the fibre might cause too fast uptake plus consequently unleveled dyeing.
These dyes are sometimes known because quick acid dyes, plus milling dyes or All-natural dyeing acid dyeing acid dyes. They have the greatest substantive of all of the acid dyes, however, have comparatively bad leveling characteristics. Unless care is taken throughout, their reasonably wise substantive for the fibre might cause too fast uptake plus consequently unleveled dyeing.
The good substantive of these dyes need neutral bathtub inside purchase to get slower fatigue plus more level dyeing. The wash fastnesses of these dyes are wise with great, whilst their light fastness is fair with advantageous. The greater wash-fastness, compared with all the additional 2 kind of acid dyes, is due with the better amount of sodium sulphate groups.
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