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Course Co-ordinated by IIT Kanpur
Coordinators
 
Dr. Padma S Vankar
IIT Kanpur

 

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Dyeing fabric is an ancient art. Natural dyeing is back and is in vogue these days. Search for newer sources is of continued interest to dyers. Thus the lectures will offer a substantial amount of information to the students.


Newer Natural dyes-Separation, Structure, Innovative Dyeing and Application using ecofriendly mordants- will deal with description of flora available at different altitudes, their morphology, their habitat, their propagation methods. Extraction of plant part for isolation of colorant, its separation by different chromatographic technique, spectroscopic analysis of the isolated colorant, structure elucidation, innovative dyeing, biomordanting and feasible application for Industrial use has been aimed to be covered in this course along with insight on synthetic dyeing on different fabrics, however much emphasis will be laid on natural dyeing.


The new sources of dye –yielding plants will be listed by their local names and botanical names- giving details of species and genus. Plants will be identified on the basis of their high dye content so that they are economically viable for industrial purpose. With the availability of standardized procedure for utilizing locally available plants/tree products to extract dyes this would help in promoting better and perhaps cheaper use of natural dyes. More than 54 plants will be demonstrated for dye- yielding plants having consistent results and acceptable fastness properties.

 

Lecture module

Topics

1

History of Dyestuff

2

Light colour and different dyestuffs

3

Classification of Natural dyes – By structure and by color

4

Relation between Color and constitution

5

Toxicity of dyestuffs

6

Synthetic Dyestuff vs Natural dyestuff

7

Commercial dyes

8

Oxidation of Colors

9

Direct cotton dyes and role of electrolytes

10

Fundamentals of Evaluation of dyestuff by analytical techniques

11

Use of chromatography in dyestuff chemistry

12

Use of Spectroscopy in dyestuff chemistry

13

Non textiles dyestuffs- Synthetic and natural

14

Medicinal properties of Natural dyes

15

Technology of dyeing

16

Basics of Natural Dyeing

17

Methods of Extraction of natural dyes

18

Standardization of Natural dyes

19

Vat dyes and dyeing

20

Pretreatments used in Dyeing

21

Dyeing machinery

22

Continuous dyeing and its adaptation for natural dyeing

23

Dyeing application of each dye on Cotton, Silk and Wool with fastness properties, CIELab values and shade card 

24

Assessment of Ecofriendliness of Naturally dyed fabrics

25

Description of the Newer Natural Dye sources- Anthroquinoids dyes

26

Description of the Newer Natural Dye sources- Indigoid dyes

27

Description of the Newer Natural Dye sources-Anthocyanin dyes

28

Description of the Newer Natural Dye sources- Betalains

29

 Isolation, and characterization of the colorant molecules from each dye plant

30

Structure- mordant interactions 

31

Dyeing applications with Reactive Dyes

32

Dyeing applications with Sulphur dyes

33

Dyeing applications of Polyester and its blends

34

Dyeing applications with polyamides

35

 Dyeing applications with Acrylics

Under development

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