Humankind has always been fascinated by colors for social and aesthetic reasons. Dyes and pigments which are the two color sources total to about 9000 in number today. A number of causes such as requirement of wide array of tints and hues, chemical composition of the substances to be colored and the direct relation of color to the molecular structure of the dye has led to the existence of this vast number.
Continue reading How did Dyes Originate and How do they Impart Color