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Explain the types of dyes based on their technique of application.
a. Picric acid and Naphthol yellow-s are examples of dyes.
dyes can be used for protein fibre such as wool and silk.
b. Crystal violet and Methylene Blue are examples of dyes.
dyes are used for dyeing animal fibres and plant fibres.
c. Alizarin is an example of dyes.
dyes have a poor affinity for cotton fabrics and hence do not dye directly.
d. Congo Red is an example of dyes.
have a high affinity for cotton, rayon and other cellulose fibre.
e. Indigo is an example of dyes.
can be used only on cotton and not on silk and wool.
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