Functional Properties and Functional Finishing with Natural Dyes and Pigments

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*Chemistry and Technology of Natural and Synthetic Dyes and Pigments*

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**Chapter 9**

**Abstract**

Dyed Textiles

functional properties of natural dyes.

antimicrobial property

**1. Introduction**

**207**

Functional Properties of Natural

Recently, due to harmful effect of climate change and other environmental concerns, the interest towards natural dyes has gained momentum. Presently in this high technological era, only aesthetic appeal of natural dyes could not get full attention of consumers. A consumer is attracted towards a type of product which is not only aesthetic but also have some functional properties. Hence considering this functional aspect, various researches are being carried out to find out the new dimensions of natural dyes. Colours and other functional properties can be achieved by various synthetic agents, but the exploration of new functional properties of natural dyes would be beneficial and relevant for the present as well as for the future. This chapter compiles all functional aspects of natural dyes which are related to adding functional properties such as antimicrobial, UV protection, insect repellent, etc. to textiles which can protect the human being from various kinds of harmful effects of surroundings such as UV radiation, microbes, bacteria and other harmful insects. This chapter will not only deal with available methods for analysis of these functional properties of natural dyes but also explore the reason for

*Deepti Pargai, Shahnaz Jahan and Manisha Gahlot*

**Keywords:** functional properties, natural dyes, UV protection textiles,

Natural dyes are obtained from different natural sources such as plants, insects,

animals and minerals. These are used for coloration of textiles and food since ancient time [1–3]. With the advent of synthetic dyes, natural dyes had been subdued for a while. Recently environmental consciousness of consumer increases due to several harmful impacts of synthetic dyes; thus, interest towards natural dyes has again gained momentum [4, 5]. Natural dyes are biodegradable as well as nontoxic. These dyes are safer for environment in terms of safe discharge [6]. In this era of climate change and different lifestyle of human being, the environment around human being becomes more harmful than the previous era. Microbes, moth insects and UV rays are causing various kinds of harmful effects to human being [7–9]. Presently the human does not wear clothes only for modesty. Hygiene, cleanliness and protection become major issues, and thus the demand for functional clothes has also increased. Textile fabric majorly covers the human skin, creating a microclimate. Presently as the climate changes, the requirement for functional

## **Chapter 9**
