Classification of Dyes on the basis of Application: Dyes are the chemical substances used to impart colour to fabrics, foods, and other objects for their beautification and distinction. They are capable of getting fixed to the fabrics/objects permanently and are resistant to the action of water, soap, light, acid and alkalies. Acid Dyes- These are azo dyes and are characterized by the salts of sulphonic or carboxylic acids. These are usually applied to wool, silk and nylon and have no affinity for cotton. Example- Orange I, Orange II, Methyl Orange, Martius Yellow and Naphthol Yellow. Basic Dyes- These dyes contain … Continue reading Classification of Dyes on the basis of Application