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Dyes and pigments are the constituents which form the the basis of the variety of colours in the world of colours.
The characteristics of dyes and pigments are:
i. Dyes and pigments release their colour when they are absorbed or stained.
ii. These are the chemical substances which impart colour to other objects.
iii. The constituents used for colouring clothes, paper, leather, plastics, ink, cosmetics, food items etc. contain different dyes and pigments.
iv. In ancient days, plant pigments were used to give colours for clothing, historical art forms, palaces, pictures, murals etc.
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Which constKerala Board Chemistry Part II