1. DYEING OF TEXTILES WITH
NATURAL DYES
Let’s shake hand with Nature…
Mr. MURALIDHAR PATHAK
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2. INTRODUCTION
Non-substantive coloring matter.
Derived from the natural sources like plants, animal
and minerals.
Applied on textiles by the help of mordants.
Transition metal ions usually have strong co-
ordinating power.
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3. ADVANTAGES OF NATURAL DYES
 Soft, lustrous and soothing to the human eye.
 Range of colors by mix and match system.
 Produce rare color ideas.
 Natural dyes are usually renewable
 No disposal problem.
 Potential to earn carbon credit.
 Non-hazardous to human health.
 Depth of some of the natural dyes are enhanced with age
 Bleed but do not stain other fabrics
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4. DISADVANTAGES OF NATURAL DYES
 Difficult to reproduce shades.
 Difficult to standardize a recipe
 Low color yield
 Lack of availability of precise technical knowledge on
extraction and dyeing techniques.
 Dyed textile may change color when exposed to the
sun, sweat and air.
 Nearly all-natural dyes with a few exceptions require the
use of mordants to fix them on to the textile substrate.
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5. CLASSIFICATION
Natural dyes can be classified in a number of
ways.
1. Substantive Dyes & Adjective Dyes
2. Monogenetic Dyes & Polygenetic Dyes
3. On the basis of hues Red, Blue, Yellow & Black.
4. On the basis of origin vegetable, mineral and animal
origin.
5. Chemical constitution.
6. Method of application
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6. TYPES OF MORDANT
1) Metallic mordants
2) Brightening mordants
3) Dulling mordants
4) Tannins
5) Oils type mordants
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7. Method of application
1.Pre-mordanting
2.Simultaneous mordanting
3.Post-mordanting
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8. PRINCIPLE OF DYEING
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